阅读说明：本技术 一种城镇道路交通控制信号产生方法 (Method for generating town road traffic control signal ) 是由 张慧熙 王玉槐 安康 江霞 孙亚萍 于 2021-10-22 设计创作，主要内容包括：本发明公开了一种城镇道路交通控制信号产生方法。本其控制的道路网格中各路口均设置有相对设置的两个横向信号灯和相对设置的两个纵向信号灯。该两个横向信号灯和两个纵向信号灯由同一个交通信号的控制器进行控制。在道路网格中,将各路口区分为A类路口和B类路口,定义每个A类路口相邻的四个路口均为B类路口；每个B类路口相邻的四个路口均为A类路口。每个路段的双向上均设置有建议车速指示牌。建议车速指示牌上能够动态显示建议行驶车速。本发明通过A类路口和B类路口的配合,使得车辆只要在不同路段均按照对应的建议行驶车速,无论横向行驶还是纵向行驶,均能够持续遇到绿灯,实现绿波区通行的效果。(The invention discloses a method for generating town road traffic control signals. Each road junction in the road grid controlled by the device is provided with two transverse signal lamps which are oppositely arranged and two longitudinal signal lamps which are oppositely arranged. The two transverse signal lamps and the two longitudinal signal lamps are controlled by the same traffic signal controller. In the road grid, dividing each intersection into an A-type intersection and a B-type intersection, and defining four adjacent intersections of each A-type intersection as B-type intersections; and four intersections adjacent to each type B intersection are all type A intersections. And suggested vehicle speed indication boards are arranged on the two sides of each road section. The recommended vehicle speed can be dynamically displayed on the recommended vehicle speed indicator. According to the invention, through the matching of the type A intersection and the type B intersection, the vehicle can continuously meet the green light no matter the vehicle runs transversely or longitudinally as long as the vehicle runs at different road sections according to the corresponding recommended running speed, and the effect of green wave zone passing is realized.)

1. A town road traffic control signal generation method is characterized by comprising the following steps: the straight lights and the left turn lights of all the road junctions in the controlled road grid are shared; the method comprises the following specific steps:

step one, settingA control period T; t ═ T₁+T₂+2T_s(ii) a Wherein, T₁Is a first passage time length; t is₂Is the second passage duration; t is_sA transition period for allowing traffic to pass and stationary traffic;

secondly, controlling signal lamp conversion of each intersection; circularly executing the steps 2-1 to 2-4; the execution time lengths of the steps 2-1 to 2-4 are respectively T₁、T_s、T₂、T_s；

The lighting sequence of the transverse signal lamp of the type A intersection in the steps 2-1 to 2-4 is green, yellow, red and red in sequence; the lighting sequence of the longitudinal signal lamp of the type A intersection in the steps 2-1 to 2-4 is red, green and yellow in sequence; the lighting sequence of the B-type crossing transverse signal lamp in the steps 2-1 to 2-3 is red, green and yellow; and the left turn lamp of the longitudinal signal lamp at the class B intersection is green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-4.

2. The method for the generation of a town road traffic control signal according to claim 1, wherein: vehicle speed indication boards are arranged on each road section in two opposite directions; the vehicle speed indicator board displays the corresponding recommended driving vehicle speed;

the suggested running vehicle speed v from the class A intersection to the class B intersection on the transverse road section and the suggested running vehicle speed v from the class B intersection to the class A intersection on the longitudinal road section₁The calculation expression of (2) is the same, and is specifically shown as the following formula:

wherein L is the length of the current road section; n is any natural number, and the suggested running speed v of each road section can be ensured to be kept within the speed limit range of the road by adjusting the numerical value of n;

the calculation expression of the recommended driving vehicle speed v from the class B intersection to the class A intersection on the transverse road section and the recommended driving vehicle speed v from the class A intersection to the class B intersection on the longitudinal road section is the same, and is specifically shown as the following formula:

3. a method for the generation of a town road traffic control signal according to claim 1, wherein: duration T, T₁And T₂The specific numerical value of (2) is determined according to the traffic flow of each road section in the road grid.

4. A town road traffic control signal generation method is characterized by comprising the following steps: the straight lights and the left turn lights at each intersection in the controlled road grid are not shared; the method comprises the following specific steps:

step one, setting a control period T; t ═ T₁+T₂+T₃+T₄+4T_s(ii) a Wherein, T₁Is a first passage time length; t is₂Is the second passage duration; t is₃A third trip duration; t is₄A fourth pass duration; t is_sA transition period for allowing traffic to pass and stationary traffic;

secondly, controlling signal lamp conversion of each intersection; circularly executing the steps 2-1 to 2-8; the execution time lengths of the steps 2-1 to 2-8 are respectively T₁、T_s、T₂、T_s、T₃、T_s、T₄、T_s；

The straight running light of the transverse signal light of the type A intersection is green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8; the lighting sequence of the left turn lamp of the transverse signal lamp at the type A intersection in the steps 2-1 to 2-8 is red, green, yellow, red and red; the straight running lights of the longitudinal signal lights of the type A crossroad are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8; the lighting sequence of the left turn lamp of the longitudinal signal lamp of the type A intersection in the steps 2-1 to 2-8 is red, green and yellow;

the straight running light of the transverse signal light of the type B intersection is red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8; the left turn lights of the transverse signal lights of the type B intersection are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8; the straight running lights of the longitudinal signal lights of the type B intersection are red, green and yellow in the lighting sequence of the steps 2-1 to 2-8; and the left turn lamp of the longitudinal signal lamp at the class B intersection is green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8.

5. A town road traffic control signal generation method is characterized by comprising the following steps: dividing each road into a main road and a non-main road; the straight running lamp and the left-turning lamp of the signal lamp corresponding to the main road are not shared; the straight running lamp and the left turning lamp of the signal lamp corresponding to the non-main road are shared;

step one, setting a control period T; t ═ T₁+T₂+T₃+T₄+4T_s(ii) a Wherein, T₁Is a first passage time length; t is₂Is the second passage duration; t is₃A third trip duration; t is₄A fourth pass duration; t is_sA transition period for allowing traffic to pass and stationary traffic;

secondly, controlling signal lamp conversion of each intersection; circularly executing the steps 2-1 to 2-8; the execution time lengths of the steps 2-1 to 2-8 are respectively T₁、T_s、T₂、T_s、T₃、T_s、T₄、T_s；

Under the condition that the transverse and longitudinal directions of each type A crossing and each type B crossing are main roads, the straight lights of the transverse signal lights of the type A crossings are green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8; the lighting sequence of the left turn lamp of the transverse signal lamp at the type A intersection in the steps 2-1 to 2-8 is red, green, yellow, red and red; the straight running lights of the longitudinal signal lights of the type A crossroad are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8; the lighting sequence of the left turn lamp of the longitudinal signal lamp of the type A intersection in the steps 2-1 to 2-8 is red, green and yellow;

the straight running light of the transverse signal light of the type B intersection is red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8; the left turn lights of the transverse signal lights of the type B intersection are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8; the straight running lights of the longitudinal signal lights of the type B intersection are red, green and yellow in the lighting sequence of the steps 2-1 to 2-8; the lighting sequence of the left turn lamp of the longitudinal signal lamp of the type B intersection in the steps 2-1 to 2-8 is green, yellow, red and red;

when a non-main road exists in the transverse and longitudinal directions of one intersection, the time period of the signal lamp in the direction of the non-main road for turning left to light green and yellow is converted into the time period of the signal lamp in the other direction of the intersection for turning straight to light green.

6. A method for the generation of a town road traffic control signal according to claim 4 or 5, wherein: the speed indicators in the positive direction and the negative direction on each road section respectively display corresponding recommended driving speeds;

the suggested running vehicle speed from the class A intersection to the class B intersection on the transverse road section and the suggested running vehicle speed v from the class B intersection to the class A intersection on the longitudinal road section₁The calculation expression of (2) is the same, and is specifically shown as the following formula:

wherein L is the length of the current road section; n is any natural number, and the suggested running speed v of each road section can be ensured to be kept within the speed limit range of the road by adjusting the numerical value of n;

the suggested running vehicle speed from the B-type crossing to the A-type crossing on the transverse road section and the suggested running vehicle speed v from the A-type crossing to the B-type crossing on the longitudinal road section₂The calculation expression of (2) is the same, and is specifically shown as the following formula:

7. a method for the generation of a town road traffic control signal according to claim 4 or 5, wherein: each signal lamp is provided with a right turn lamp; the lighting state of the right turn lamp is consistent with the lighting state of the left turn lamp in the signal lamp corresponding to the next intersection along the current direction.

8. A method for the generation of a town road traffic control signal according to claim 4 or 5, wherein: also includes T-junction; the indicator light corresponding to the T-shaped road part of the T-shaped intersection is not provided with a straight going light; the time of the green light of the indicator light corresponding to the T-shaped road part is converted into the time of the green light of the indicator light corresponding to the T-shaped road part or the time of the green light of the left turn light of the indicator light corresponding to the T-shaped road part.

9. A method for the generation of a town road traffic control signal according to claim 4 or 5, wherein: t, T₁、T₂、T₃And T₄The specific numerical value of (2) is determined according to the traffic flow of each road section in the road grid.

10. A traffic signal controller, characterized by: for implementing a method for the generation of a town road traffic control signal according to any one of claims 1 to 5.

Technical Field

The invention belongs to the technical field of town traffic management, and particularly relates to a method for generating a town road traffic control signal.

Background

The traffic signal lamps of various intersections of the existing town roads are controlled independently, whether vehicles can continue to pass through the intersections is random when the vehicles pass through the intersections, the passing efficiency is obviously influenced, a few main roads are controlled in a coordinated mode, and if the vehicles start from one intersection to drive to the next intersection at the recommended speed, the vehicles can encounter a released green light signal. In addition to the main road, it is desired to improve the passing efficiency in a wider range, and therefore, various technical solutions have been proposed. In the prior art, most schemes need to design a complex network and introduce expensive special equipment, so that the ground is difficult to fall; the scheme of application number 201810649703.5 provides a cross road and transverse road intersection cooperative control technology, but only allows vehicles at one of four sub-intersections of the cross road to pass in the same time period, which is inconsistent with the cognition formed by people for a long time, and more importantly, the scheme can improve the passing efficiency only under the condition that the straight traffic is less than the turning traffic.

Disclosure of Invention

The invention aims to provide a method for generating town road traffic control signals.

In a first aspect, the invention provides a method for generating town road traffic control signals, wherein each intersection in a road grid controlled by the method is provided with two transverse signal lamps which are arranged oppositely and two longitudinal signal lamps which are arranged oppositely. The two transverse signal lamps and the two longitudinal signal lamps are controlled by the same traffic signal controller. In the road grid, dividing each intersection into an A-type intersection and a B-type intersection, and defining four adjacent intersections of each A-type intersection as B-type intersections; and four intersections adjacent to each type B intersection are all type A intersections. And suggested vehicle speed indication boards are arranged on the two sides of each road section. The recommended vehicle speed can be dynamically displayed on the recommended vehicle speed indicator.

The town road traffic control signal generation method comprises three traffic control signal generation methods which respectively correspond to three different road conditions.

The first traffic control signal generating method corresponds to the condition that the straight running lamp and the left turn lamp at each intersection are shared, and comprises the following specific steps of:

step one, setting a control period T; t ═ T₁+T₂+2T_s(ii) a Wherein, T₁Is a first passage time length; t is₂Is the second passage duration; t is_sFor allowing transit time periods with stationary transit.

And step two, controlling the signal lamp conversion of each intersection. And (5) circularly executing the steps 2-1 to 2-4. The execution time lengths of the steps 2-1 to 2-4 are respectively T₁、T_s、T₂、T_s。

The lighting sequence of the A-type crossing transverse signal lamp in the steps 2-1 to 2-4 is green, yellow, red and red in sequence. The lighting sequence of the longitudinal signal lamp of the type A intersection in the steps 2-1 to 2-4 is red, green and yellow in sequence. The lighting sequence of the B-type crossing transverse signal lamp in the steps 2-1 to 2-3 is red, green and yellow. And the left turn lamp of the longitudinal signal lamp at the class B intersection is green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-4.

Preferably, the vehicle speed indicators in the opposite directions on each road section display the corresponding recommended travel vehicle speeds.

The suggested running vehicle speed from the class A intersection to the class B intersection on the transverse road section and the suggested running vehicle speed v from the class B intersection to the class A intersection on the longitudinal road section₁The calculation expression of (2) is the same, and is specifically shown as the following formula:

wherein L is the length of the current road section; n is any natural number, and the suggested running speed v of each road section can be ensured to be kept within the speed limit range of the road by adjusting the numerical value of n.

The suggested running vehicle speed from the B-type crossing to the A-type crossing on the transverse road section and the suggested running vehicle speed v from the A-type crossing to the B-type crossing on the longitudinal road section₂The calculation expression of (2) is the same, and is specifically shown as the following formula:

the second traffic control signal generation method corresponds to the situation that the straight running lamp and the left turn lamp at each intersection are not shared, and comprises the following specific steps:

step one, setting a control period T; t ═ T₁+T₂+T₃+T₄+4T_s(ii) a Wherein, T₁Is a first passage time length; t is₂Is the second passage duration; t is₃A third trip duration; t is₄A fourth pass duration; t is_sFor allowing transit time periods with stationary transit.

And step two, controlling the signal lamp conversion of each intersection. And circularly executing the steps 2-1 to 2-8. The execution time lengths of the steps 2-1 to 2-8 are respectively T₁、T_s、T₂、T_s、T₃、T_s、T₄、T_s。

The straight running lights of the transverse signal lights at the type A intersection are green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. The lighting sequence of the left turn lamp of the transverse signal lamp at the type A intersection in the steps 2-1 to 2-8 is red, green, yellow, red and red. The straight running lights of the longitudinal signal lights at the type A intersection are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. The lighting sequence of the left turn lamp of the longitudinal signal lamp at the type A intersection in the steps 2-1 to 2-8 is red, green and yellow.

The straight running lights of the B-type crossing transverse signal lights are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. And the left turn lights of the B-type crossing transverse signal lights are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. The straight running lights of the longitudinal signal lights at the type B intersection are red, green and yellow in the lighting sequence of the steps 2-1 to 2-8. And the left turn lamp of the longitudinal signal lamp at the class B intersection is green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8.

The third traffic control signal generation method divides each road into a main road and a non-main road; the straight running lamp and the left-turning lamp of the signal lamp corresponding to the main road are not shared; the straight running lamp and the left turning lamp of the signal lamp corresponding to the non-main road are shared; the method comprises the following specific steps:

step one, setting a control period T; t ═ T₁+T₂+T₃+T₄+4T_s(ii) a Wherein, T₁Is a first passage time length; t is₂Is the second passage duration; t is₃A third trip duration; t is₄A fourth pass duration; t is_sFor allowing transit time periods with stationary transit.

And step two, controlling the signal lamp conversion of each intersection. And circularly executing the steps 2-1 to 2-8. The execution time lengths of the steps 2-1 to 2-8 are respectively T₁、T_s、T₂、T_s、T₃、T_s、T₄、T_s。

Under the condition that the transverse and longitudinal directions of all the type A intersections and the type B intersections are main roads, the straight lights of the transverse signal lights of the type A intersections are green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. The lighting sequence of the left turn lamp of the transverse signal lamp at the type A intersection in the steps 2-1 to 2-8 is red, green, yellow, red and red. The straight running lights of the longitudinal signal lights at the type A intersection are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. The lighting sequence of the left turn lamp of the longitudinal signal lamp at the type A intersection in the steps 2-1 to 2-8 is red, green and yellow.

The straight running lights of the B-type crossing transverse signal lights are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. And the left turn lights of the B-type crossing transverse signal lights are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. The straight running lights of the longitudinal signal lights at the type B intersection are red, green and yellow in the lighting sequence of the steps 2-1 to 2-8. And the left turn lamp of the longitudinal signal lamp at the class B intersection is green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8.

When a non-main road exists in the transverse and longitudinal directions of one intersection, the time period of the signal lamp in the direction of the non-main road for turning left to light green and yellow is converted into the time period of the signal lamp in the other direction of the intersection for turning straight to light green.

Preferably, in the second traffic control signal generation method or the third traffic control signal generation method, the vehicle speed indicators in the forward and reverse directions on each link respectively display corresponding recommended travel speeds.

The suggested running vehicle speed from the class A intersection to the class B intersection on the transverse road section and the suggested running vehicle speed v from the class B intersection to the class A intersection on the longitudinal road section₁The calculation expression of (2) is the same, and is specifically shown as the following formula:

wherein L is the length of the current road section; n is any natural number, and the suggested running speed v of each road section can be ensured to be kept within the speed limit range of the road by adjusting the numerical value of n.

The suggested running vehicle speed from the B-type crossing to the A-type crossing on the transverse road section and the suggested running vehicle speed v from the A-type crossing to the B-type crossing on the longitudinal road section₂The calculation expression of (2) is the same, and is specifically shown as the following formula:

preferably, each of the signal lamps is provided with a right turn lamp on the basis of the second traffic control signal generating method or the third traffic control signal generating method. The lighting state of the right turn lamp is consistent with the lighting state of the left turn lamp in the signal lamp corresponding to the next intersection along the current direction.

Preferably, the traffic control system further includes a t-junction on the basis of the second traffic control signal generation method or the third traffic control signal generation method. The indicator light corresponding to the T-shaped road part of the T-shaped intersection is not provided with a straight going light; the time of the green light of the indicator light corresponding to the T-shaped road part is converted into the time of the green light of the indicator light corresponding to the T-shaped road part or the time of the green light of the left turn light of the indicator light corresponding to the T-shaped road part.

In a second aspect, the present invention provides a town road traffic indication system, which includes lateral signal lights, longitudinal signal lights at each intersection in a road grid, bidirectional speed indicators on each lane, and a controller. The controller controls the transverse signal lamps, the longitudinal signal lamps and the vehicle speed indicator boards to light and extinguish and display the recommended driving vehicle speed according to the method.

The invention has the beneficial effects that:

1. according to the invention, each road junction in the grid road is divided into the A-type road junction and the B-type road junction which are not adjacent to each other, and through the cooperation of the A-type road junction and the B-type road junction, a vehicle can continuously meet a green light as long as the vehicle runs on different road sections according to corresponding recommended speed, no matter the vehicle runs transversely or longitudinally, and the effect of green wave zone traffic is realized.

2. The invention provides a plurality of control strategies aiming at different signal lamp conditions, so that the invention can be compatible with a plurality of different grid road conditions.

3. The invention can realize the optimization of the whole traffic efficiency in the grid road only by adjusting the signal lamp control and setting the suggested vehicle speed indicator which can be dynamically adjusted.

Drawings

FIG. 1 is a schematic view of a road grid to be controlled at step 2-1 in embodiment 1 of the present invention;

fig. 2 is a schematic diagram of the road grid controlled in embodiment 1 of the present invention at step 2-3.

Fig. 3 is a schematic diagram of the road grid controlled in embodiment 2 of the present invention at step 2-3.

Fig. 4 is a schematic diagram of the road grid controlled in embodiment 2 of the present invention at steps 2-7.

FIG. 5 is a schematic view of a road grid controlled in embodiment 3 of the present invention;

FIG. 6 is a schematic view of a road grid controlled in embodiment 4 of the present invention;

fig. 7 is a schematic view of a road grid controlled in embodiment 5 of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1

A method for generating traffic control signals of town roads aims at the simple condition that straight lights and left turn lights of each intersection in a controlled road grid are shared and no right turn light is arranged.

Each road junction in the road grid to be controlled is provided with two transverse signal lamps which are arranged oppositely and two longitudinal signal lamps which are arranged oppositely. The two transverse signal lamps and the two longitudinal signal lamps are controlled by the same traffic signal controller. In the road grid, dividing each intersection into an A-type intersection and a B-type intersection, and defining four adjacent intersections of each A-type intersection as B-type intersections; four intersections adjacent to each type B intersection are type A intersections; the controller of each intersection adopts a uniform time reference and stores own identity information, namely the intersection corresponds to the type A intersection or the type B intersection, and the distance information between the intersection and four adjacent intersections is also stored. The controllers of the type A intersection and the type B intersection generate signal lamp control signals according to an appointed time interval on the basis of unified time reference.

The concrete situation of the road grid is shown in fig. 1, (1) the indicated box indicates that the intersection is a type a intersection 1, (2) the indicated circle indicates that the intersection is a type B intersection 2; the short horizontal lines in the boxes and circles indicate that the intersection is allowed to run straight horizontally, and indicate that the intersection is prevented from running straight vertically; the short vertical lines in the boxes and circles indicate that the intersection is prohibited from going straight in the transverse direction, and indicate that straight running is allowed in the longitudinal direction.

And suggested vehicle speed indication boards are arranged on the two sides of each road section. The road section represents a lane formed between two adjacent intersections, and has two directions (from the type a intersection to the type B intersection and from the type B intersection to the type a intersection, respectively). The recommended vehicle speed can be dynamically displayed on the recommended vehicle speed indicator. When the vehicle runs according to the recommended running speed, the vehicle can meet the red light at most once in straight line running (namely, after waiting for one red light, the vehicle meets the green light subsequently).

The method comprises the following specific steps:

step one, setting a control period T; t ═ T₁+T₂+2T_s(ii) a Wherein, T₁Is a first passage time length; t is₂Is the second passage duration; t is_sFor allowing transit time periods with stationary transit. T, T₁And T₂The specific value of (2) is set and adjusted according to the traffic flow in the road grid, for example, the traffic flow and the corresponding time interval can be divided into 3 time intervals including a clear time interval, a flat time interval and a peak time interval. The control cycles of the clear period, the flat period and the peak period are increased in sequence, the average vehicle speed is recommended to be reduced in sequence, and vehicles which run transversely or longitudinally straight can still meet the green light signal all the time while waiting for only one red light at most. The control cycle may be divided into 3 or more periods according to the magnitude of the traffic flow. When special conditions, such as extreme congestion conditions, occur, the control strategy is switched to manual control. The present embodiment sets: each passage being of equal duration, i.e. T₁＝T₂. The vehicle speed indicators in two directions on each road section respectively display the recommended driving vehicle speed.

The suggested running vehicle speed from the class A intersection to the class B intersection on the transverse road section and the suggested running vehicle speed v from the class B intersection to the class A intersection on the longitudinal road section₁The calculation expression of (2) is the same, and is specifically shown as the following formula:

wherein L is the length of the current road section; the value of n is zero or a positive integer, and the suggested running speed v of each road section can be ensured to be kept within the road speed limit range by adjusting the value of n.

The suggested running vehicle speed from the B-type crossing to the A-type crossing on the transverse road section and the suggested running vehicle speed v from the A-type crossing to the B-type crossing on the longitudinal road section₂The calculation expression of (2) is the same, and is specifically shown as the following formula:

when T is₁＝T₂And the recommended running speeds in the two directions on each road section are equal. The signal lamps of each intersection change circularly according to the mode in the step 2-2; a control period T passes each time step 2-2 is performed.

And step two, controlling the signal lamp conversion of each intersection. And (5) circularly executing the steps 2-1 to 2-4.

2-1. as shown in FIG. 1, at T₁Duration (0-T in control period T)₁Time range of) the transverse signal lights of the type A crossing and the longitudinal signal lights of the type B crossing are all green; the longitudinal signal lamps of the type A intersections and the transverse signal lamps of the type B intersections are all green.

2-2 at T_sDuration (T in control period T)₁～T₁+T_sWithin the time range), the transverse signal lamps of the type A intersections and the longitudinal signal lamps of the type B intersections both light yellow lamps; the longitudinal signal lamps of the type A intersections and the transverse signal lamps of the type B intersections are all lighted in red.

2-3. As shown in FIG. 2, at T₂Duration (T in control period T)₁+T_s～T₁+T₂+T_sTime range of) the red lights are lighted by both the transverse signal lights of the type A crossing and the longitudinal signal lights of the type B crossing; the longitudinal signal lamps of the type A intersections and the transverse signal lamps of the type B intersections are all green.

2-4 at T_sDuration (T in control period T)₁+T₂+T_s～T₁+T₂+2T_sTime range of) the red lights are lighted by both the transverse signal lights of the type A crossing and the longitudinal signal lights of the type B crossing; the longitudinal signal lamps of the type A intersections and the transverse signal lamps of the type B intersections both light yellow lamps.

The process of step two can be understood with reference to table 1.

TABLE 1 road network signal lamp control table for straight and turning

As can be seen from Table 1: on a cross road, if the vehicle starting from the cross signal of the type A crossing turns green (such as the first row and the first column of the signal area in Table 1), the vehicle starts to run at the average speedWhen the vehicle runs to an adjacent B-type intersection, the transverse signal lamp of the B-type intersection just turns green; the vehicle runs straight through the class B intersection to continue running; if at the average speedWhen the vehicle runs to the adjacent A-type crossing, the transverse signal lamp of the A-type crossing just turns green. By analogy, a green wave band can be formed on any one transverse road in the road grid.

Similarly, on a longitudinal road, when a longitudinal signal light of a class B intersection turns green (such as the fourth row in the first row of the signal area in Table 1), a vehicle which starts to start at the average speedWhen the vehicle runs to an adjacent A-type intersection, the longitudinal signal lamp of the A-type intersection just turns green; and the vehicle can go straight through the class A intersection to continue driving. If at the average speedWhen the vehicle runs to an adjacent B-type crossing, the longitudinal signal lamp of the B-type crossing just turns green. By analogy, a green wave band can be formed on any longitudinal road.

In conclusion, in the whole area, vehicles on the transverse and longitudinal roads can continuously pass through a plurality of intersections only when meeting red light once under the condition of keeping straight running, so that the passing effect of a green wave area is realized, the passing efficiency is greatly improved, and the implementation cost is low.

As traffic peaks approach, the controller may increase T₁Or T₂The numerical value of (1) to adapt to the conditions of increasing vehicles and slowing down the speed;as traffic peaks go far away, the controller may decrease T₁Or T₂The numerical value of (1) is suitable for the conditions of vehicle reduction and vehicle speed increase.

Example 2

A method for generating traffic control signals of town roads aims at the condition that a straight lamp and a left turn lamp of each intersection in a controlled road grid are not shared and a right turn lamp is not arranged.

Each road junction in the road grid to be controlled is provided with two transverse signal lamps which are arranged oppositely and two longitudinal signal lamps which are arranged oppositely. And each transverse signal lamp and each longitudinal signal lamp are provided with a left-turn lamp and a straight lamp which can display green, yellow and red. The two transverse signal lamps and the two longitudinal signal lamps are controlled by the same traffic signal controller. In the road grid, dividing each intersection into an A-type intersection and a B-type intersection, and defining four adjacent intersections of each A-type intersection as B-type intersections; four intersections adjacent to each type B intersection are type A intersections; the controller of each intersection adopts a uniform time reference and stores own identity information, namely the intersection corresponds to the type A intersection or the type B intersection, and the distance information between the intersection and four adjacent intersections is also stored. The controllers of the type A intersection and the type B intersection generate signal lamp control signals according to an appointed time interval on the basis of unified time reference.

And suggested vehicle speed indication boards are arranged on the two sides of each road section. The road section represents a lane formed between two adjacent intersections, and has two directions (from the type a intersection to the type B intersection and from the type B intersection to the type a intersection, respectively). The recommended vehicle speed can be dynamically displayed on the recommended vehicle speed indicator. When the vehicle runs according to the recommended running speed, the vehicle can meet the red light at most once in straight line running (namely, after waiting for one red light, the vehicle meets the green light subsequently).

The method comprises the following specific steps:

step one, setting a control period T; t ═ T₁+T₂+T₃+T₄+4T_s(ii) a Wherein, T₁Is a first passage time length; t is₂Is the second passage duration; t is₃A third trip duration; t is₄Is a fourthThe passing time length; t is_sFor allowing transit time periods with stationary transit. T, T₁、T₂、T₃And T₄The specific numerical value of (2) is artificially determined according to the length and the traffic flow of each road section in the road grid. The vehicle speed indicators in two directions on each road section respectively display the recommended driving vehicle speed.

The suggested running vehicle speed from the class A intersection to the class B intersection on the transverse road section and the suggested running vehicle speed v from the class B intersection to the class A intersection on the longitudinal road section₁The calculation expression of (2) is the same, and is specifically shown as the following formula:

wherein L is the length of the current road section; n is any natural number, and the suggested running speed of each road section can be kept within the speed limit range of the road by adjusting the numerical value of n.

The suggested running vehicle speed from the B-type crossing to the A-type crossing on the transverse road section and the suggested running vehicle speed v from the A-type crossing to the B-type crossing on the longitudinal road section₂The calculation expression of (2) is the same, and is specifically shown as the following formula:

when T is₁+T₂＝T₃+T₄And the recommended running speeds in the two directions on each road section are equal. The signal lamps of each intersection change circularly according to the mode in the step 2-2; a control period T passes each time step 2-2 is performed.

And step two, controlling the signal lamp conversion of each intersection. And circularly executing the steps 2-1 to 2-8.

2-1 at T₁Duration (0-T in control period T)₁Within the time range), the straight lights of the transverse signal lights of the type A crossing and the straight lights of the longitudinal signal lights of the type B crossing are all green; left turn lamp of transverse signal lamp, straight running lamp of longitudinal signal lamp and left side of A type intersectionThe left turn lamp of the transverse signal lamp, the straight running lamp and the left turn lamp of the longitudinal signal lamp of the turn lamp and the type B crossing are all lighted in red. As shown in fig. 1.

2-2 at T_sDuration (T in control period T)₁～T₁+T_sWithin the time range), yellow lights are lighted on the straight lights of the transverse signal lights of the type A crossing and the straight lights of the longitudinal signal lights of the type B crossing; and the left turn lamp of the transverse signal lamp, the straight running lamp of the longitudinal signal lamp and the left turn lamp of the transverse signal lamp, the straight running lamp and the left turn lamp of the longitudinal signal lamp at the type A crossing are all red. As shown in fig. 1.

2-3 at T₂Duration (T in control period T)₁+T_s～T₁+T₂+T_sWithin the time range), the left turn lights of the transverse signal lights of the type A intersections and the left turn lights of the longitudinal signal lights of the type B intersections are all green; the straight lights of the transverse signal lights, the straight lights and the left-turn lights of the longitudinal signal lights of the type A crossing, and the straight lights of the transverse signal lights, the straight lights and the longitudinal signal lights of the type B crossing are all red. As shown in fig. 3.

2-4 at T_sDuration (T in control period T)₁+T₂+T_s～T₁+T₂+2T_sWithin the time range), yellow lights are lighted on the left turn lights of the transverse signal lights of the type A crossing and the left turn lights of the longitudinal signal lights of the type B crossing; the straight lights of the transverse signal lights, the straight lights and the left-turn lights of the longitudinal signal lights of the type A crossing, and the straight lights of the transverse signal lights, the straight lights and the longitudinal signal lights of the type B crossing are all red. As shown in fig. 3.

2-5 at T₃Duration (T in control period T)₁+T₂+2T_s～T₁+T₂+T₃+2T_sWithin the time range), the straight lights of the longitudinal signal lights of the type A intersections and the straight lights of the transverse signal lights of the type B intersections are all green; and the left turn lamp of the longitudinal signal lamp, the straight running lamp of the transverse signal lamp and the left turn lamp of the longitudinal signal lamp, the straight running lamp and the left turn lamp of the transverse signal lamp at the type A crossing are all red. As shown in fig. 2.

2-6 at T_sDuration (T in control period T)₁+T₂+T₃+2T_s～T₁+T₂+T₃+3T_sWithin the time range), yellow lights are lighted on both the straight lights of the longitudinal signal lights of the type A intersections and the straight lights of the transverse signal lights of the type B intersections; and the left turn lamp of the transverse signal lamp, the straight running lamp of the longitudinal signal lamp and the left turn lamp of the transverse signal lamp, the straight running lamp and the left turn lamp of the longitudinal signal lamp at the type A crossing are all red. As shown in fig. 2.

2-7 at T₄Duration (T in control period T)₁+T₂+T₃+3T_s～T₁+T₂+T₃+T₄+3T_sTime range of) the left turn lights of the longitudinal signal lights of the type A crossing and the left turn lights of the transverse signal lights of the type B crossing are all green; the straight lights of the longitudinal signal lights, the straight lights and the left-turn lights of the transverse signal lights of the type A crossing, and the straight lights of the left-turn lights, the straight lights and the transverse signal lights of the longitudinal signal lights of the type B crossing are all red. As shown in fig. 4.

2-8 at T_sDuration (T in control period T)₁+T₂+T₃+T₄+3T_s～T₁+T₂+T₃+T₄+4T_sWithin the time range), yellow lights are lighted on the left turn lights of the longitudinal signal lights of the type A crossing and the left turn lights of the transverse signal lights of the type B crossing; the straight lights of the longitudinal signal lights, the straight lights and the left-turn lights of the transverse signal lights of the type A crossing, and the straight lights of the left-turn lights, the straight lights and the transverse signal lights of the longitudinal signal lights of the type B crossing are all red. As shown in fig. 4.

The process of step two can be understood with reference to table 2.

Table 2 road grid signal lamp control table for straight going and turning

As can be seen from Table 2: on a transverse road, transversely from class A intersectionsIf the vehicle started to start at the straight signal green (e.g. the first row and the first column of the signal zone in table 2), the vehicle starts to start at the average speedWhen the vehicle runs to an adjacent B-type intersection, the transverse straight-going lamp of the B-type intersection just turns green; go straight through the class B intersection and continue to run at the average speedWhen the vehicle runs to the next A-class crossing, the transverse straight-going lamp of the A-class crossing just turns green. By analogy, a green wave band can be formed on any transverse road in the area.

Similarly, on a longitudinal road, when a longitudinal straight-going light at a type B intersection turns green (for example, the seventh row in the first row of the signal area in Table 2), a vehicle which starts to start at the average speedWhen the vehicle runs to an adjacent A-type intersection, the longitudinal straight running lamp of the A-type intersection just turns green; the vehicle can go straight through the class A intersection and continue to run at the average speedWhen the vehicle runs to the next B-type crossing, the longitudinal straight-going lamp of the B-type crossing just turns green. By analogy, a green wave band can be formed on any longitudinal road.

In conclusion, in the whole area, vehicles on the transverse and longitudinal roads can continuously pass through a plurality of intersections only when meeting red light once under the condition of keeping straight running, so that the passing effect of a green wave area is realized, the passing efficiency is greatly improved, and the implementation cost is low.

As traffic peaks approach, the controller may increase T₁～T₄To adapt to the conditions of vehicle increase and vehicle speed reduction; as traffic peaks go far away, the controller may decrease T₁～T₄To accommodate a decrease in vehicle speed, an increase in vehicle speed.

The following is further illustrated by numerical means.

(a) The traffic flow in the road network is small. For a transverse road, if L is 500 m, n is 0 and T is taken₁+T₂+2T_s40 seconds, then v₁12.5 m/s, i.e. the recommended average vehicle speed v₁45 km/h; the method means that when the class A intersection is transversely and straightly released and forbidden in other directions in the road network and the class B intersection is transversely and straightly forbidden in other directions, the vehicle starts from the class A intersection transversely and straightly and then is longitudinally released at the next intersection for time T₁+T₂+2T_sAnd when the vehicle runs at the average speed of 45 km/h, the vehicle just vertically passes when reaching the type B intersection and the transition time is finished, and the transverse straight-going passing signal is turned on, so that the vehicle can continue to transversely run straight. For a longitudinal road, if L is 500 m, n is 0 and T is taken₃+T₄+2T_s40 seconds, then v₂12.5 m/s, i.e. the recommended average vehicle speed v₂45 km/h; the method means that when the class B crossing is longitudinally and straightly released and forbidden in other directions in the road network and the class A crossing is longitudinally and straightly forbidden, the vehicle starts from the class B crossing and is transversely released at the next crossing for time T₃+T₄+2T_sAnd when the vehicle runs at the average speed of 45 km/h, the transverse release and the transition time are just finished when the vehicle reaches the class A intersection, and the longitudinal straight-going release signal is turned on, so that the vehicle can continue to run longitudinally straight.

For vehicles turning left and vehicles randomly converging into the road between two intersections, if the vehicles cannot catch up with the clearance signal, the vehicles can continuously run straight only by waiting for the next clearance signal and according to the suggested average speed. Because the class-A intersections and the class-B intersections are arranged in a staggered mode and the same control strategy is adopted on the same time reference, the passing effect of the filtering area can be achieved. The embodiment encourages more straight running and less turning, and also conforms to the habit that the common driver dislikes turning.

(b) The traffic flow in the road network increases. In contrast to the case (a), the other parameters of the control parameters are not changed, and only T is used₁+T₂+2T_sOr T₃+T₄+2T_sIncreasing to 60 seconds, i.e. changing controlSystem period, then v₁＝v₂The average vehicle speed is recommended to be reduced to 30 km/h when the vehicle speed is 8.33 m/s. This is consistent with the fact that when there are more vehicles entering and exiting the road, the vehicles traveling on the road need to control the vehicle distance or slow down to allow them to travel, thereby reducing the average vehicle speed. Table 2 covers the cases (a) and (b), but does not apply to the following case (c).

(c) If the traffic flow in the road network is large, v is easy to calculate by only changing the value of the parameter n in the formula (3) or the formula (4) from 0 to 1 compared with the condition of the parameter (a)₁＝v₂4.17 m/s, the average vehicle speed is recommended to be 15 km/h. The situation corresponds to serious road congestion, and at the moment, the distance between vehicles on the road is small, the speed of the vehicle is slow, and the vehicle cannot be at T₁+T₂+2T_sOr T₃+T₄+2T_sTravel a distance of L. It is also not desirable to increase the control period T too much according to the concept of (b) because the road ahead cannot accommodate vehicles passing through the intersection for a longer clearance period, and thus a clear clearance signal appears but the driver has to be reminded that the intersection cannot be driven in when encountering a jam. At this time, the basic traffic signal rule is destroyed, different traffic participants are enabled to have different pinching scales, and the difficulty of traffic police law enforcement is increased. Therefore, during traffic rush hours, it is a better option to use a shorter traffic signal control period.

As can be seen from table 2 and fig. 1 to 4: in the whole area, the vehicle can continuously and straightly pass through a plurality of intersections only meeting a red light once when running at the recommended average speed; after turning, the effect of only waiting for one red light and then continuously passing through a plurality of straight crossings can be achieved when the vehicle moves straight in the other direction. Therefore, the passing effect of the green wave zone is realized, and the passing efficiency is greatly improved. Because the class-A intersection and the class-B intersection only adopt the same time reference and the same control strategy, a complex control network does not need to be constructed, and the implementation cost is greatly reduced compared with other technical schemes.

It is worth pointing out that the green wave zone traffic state is realized by reducing the waiting time of vehicles, is beneficial to reducing the emission of motor vehicles and the power consumption of new energy vehicles, and is helpful to realize the ecological targets of carbon peak reaching and carbon neutralization early.

It should also be noted that the division of the horizontal and vertical roads is equivalent, and if all horizontal and vertical keywords are interchanged, the conclusion is not changed; the division of the type A intersection when meeting the type B intersection is also equivalent, and if the key words A and B are interchanged, the conclusion is not changed.

Example 3

A town road traffic control signal generation method aims at the condition that a controlled road grid comprises a main road and a non-main road. And the straight running lamp and the left-turning lamp in the signal lamp corresponding to the main road are not shared and the right-turning control is not considered. The straight-going lamp and the left-turning lamp in the signal lamp corresponding to the non-main road intersection are shared and are not provided with the right-turning lamp. Two groups of transverse signal lamps which are arranged oppositely and two groups of longitudinal signal lamps which are arranged oppositely are arranged at each road junction in the controlled road network. The two groups of transverse signal lamps and the two groups of longitudinal signal lamps are controlled by the same traffic signal controller. In the road grid, dividing each intersection into an A-type intersection and a B-type intersection, and defining four adjacent intersections of each A-type intersection as B-type intersections; four intersections adjacent to each type B intersection are type A intersections; the controller of each intersection adopts a uniform time reference, stores own identity information (namely the intersection corresponds to the type A intersection or the type B intersection) and stores distance information between the intersection and four adjacent intersections. The controllers of the type A intersection and the type B intersection generate signal lamp control signals according to an appointed time interval on the basis of unified time reference.

In fig. 5, square and rectangular boxes represent intersections of class a, and circular and oval boxes represent intersections of class B. The larger distance between two parallel lines between the intersections represents the main road, and the smaller distance between the parallel lines represents the non-main road. The following control algorithm description focuses on the intersection (5).

And suggested vehicle speed indication boards are arranged on the two sides of each road section. A road segment represents a lane formed between two adjacent intersections, having two directions: one direction from the type A intersection to the type B intersection and one direction from the type B intersection to the type A intersection. The recommended vehicle speed can be dynamically displayed on the recommended vehicle speed indicator. When the vehicle runs according to the recommended running speed, the vehicle can meet the red light at most once during running in the straight-running direction, and then all the vehicles meet the straight-running green light.

And suggested vehicle speed indication boards are arranged on the two sides of each road section. The road section represents a lane formed between two adjacent intersections, and has two directions (from the type a intersection to the type B intersection and from the type B intersection to the type a intersection, respectively). The recommended vehicle speed can be dynamically displayed on the recommended vehicle speed indicator. When the vehicle runs according to the recommended running speed, the vehicle can meet the red light at most once in straight line running (namely, after waiting for one red light, the vehicle meets the green light subsequently).

The method comprises the following specific steps:

step one, setting a control period T; t ═ T₁+T₂+T₃+T₄+4T_s(ii) a Wherein, T₁Is a first passage time length; t is₂Is the second passage duration; t is₃A third trip duration; t is₄A fourth pass duration; t is_sFor allowing transit time periods with stationary transit. T, T₁、T₂、T₃And T₄The specific numerical value of (2) is artificially determined according to the length and the traffic flow of each road section in the road grid. The vehicle speed indicators in two directions on each road section respectively display the recommended driving vehicle speed.

The suggested running vehicle speed from the class A intersection to the class B intersection on the transverse road section and the suggested running vehicle speed v from the class B intersection to the class A intersection on the longitudinal road section₁The calculation expression of (2) is the same, and is specifically shown as the following formula:

wherein L is the length of the current road section; n is any natural number, and the suggested running speed v of each road section can be ensured to be kept within the speed limit range of the road by adjusting the numerical value of n.

The suggested running vehicle speed from the B-type crossing to the A-type crossing on the transverse road section and the suggested running vehicle speed v from the A-type crossing to the B-type crossing on the longitudinal road section₂Has the same calculation expression asThe body is represented by the following formula:

when T is₁+T₂＝T₃+T₄And the recommended running speeds in the two directions on each road section are equal. The signal lamps of each intersection change circularly according to the mode in the step 2-2; a control period T passes each time step 2-2 is performed.

And step two, controlling the signal lamp conversion of each intersection. And circularly executing the steps 2-1 to 2-8.

Under the condition that the two directions of the two adjacent intersections are main roads, the on-off sequence of each signal lamp is consistent with that of the embodiment 2; the straight running lights of the transverse signal lights at the type A intersection are green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. The lighting sequence of the left turn lamp of the transverse signal lamp at the type A intersection in the steps 2-1 to 2-8 is red, green, yellow, red and red. The straight running lights of the longitudinal signal lights at the type A intersection are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. The lighting sequence of the left turn lamp of the longitudinal signal lamp at the type A intersection in the steps 2-1 to 2-8 is red, green and yellow.

The straight running lights of the B-type crossing transverse signal lights are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. And the left turn lights of the B-type crossing transverse signal lights are red, green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8. The straight running lights of the longitudinal signal lights at the type B intersection are red, green and yellow in the lighting sequence of the steps 2-1 to 2-8. And the left turn lamp of the longitudinal signal lamp at the class B intersection is green, yellow, red and red in the lighting sequence of the steps 2-1 to 2-8.

In the case where there is a non-main road in both the lateral and longitudinal directions of the intersection, the time period in which the left turn light of the traffic light in the non-main road direction turns on green and yellow is cancelled, and this time period is converted into the time period in which the straight going light of the traffic light in the vertical direction of the intersection (i.e., the other direction of the aforementioned non-main road direction) turns on green.

For example, when a transverse road at an intersection is a main road and a longitudinal road is a non-main road, the longitudinal signal lamp at the intersection is not provided with a left turn lamp, and the time period originally used for the left turn lamp of the longitudinal signal lamp to turn green and the time period used for the yellow lamp of the longitudinal signal lamp are replaced by the straight lamp of the transverse signal lamp to turn green. Otherwise, the same principle is applied.

When both directions of the intersection are non-main lanes, the time for the transverse signal lamp and the longitudinal signal lamp to mutually convert the left turn green light and the yellow light of the opposite side into the self green light is changed to the case described in embodiment 1.

Taking the case that the type a intersections are main roads transversely and longitudinally, the type B intersections are main roads transversely and non-main roads longitudinally as an example, at this time, the process of the second step can be understood with reference to table 3.

TABLE 3 road grid signal lamp control chart considering distinction between main road and non-main road

As can be seen from Table 3: on a transverse road, if the vehicle starting from the transverse straight signal of the type A crossing turns green (such as the first row and the first column of the signal area in the table 3), the vehicle starts to move at the average speedWhen the vehicle runs to an adjacent B-type intersection, the transverse straight-going lamp at the B-type intersection turns green in advance; go straight through the class B intersection and continue to run at the average speedWhen the vehicle runs to the next A-class crossing, the transverse straight-going lamp of the A-class crossing just turns green. By analogy, a green wave band can be formed on any transverse road in the area. n is a positive integer. The reason why the road at the B-type intersection is changed into green in advance is that the longitudinal road of the B-type intersection is a non-main road, and the left turn signal time of the non-main road is transferred to the main road as the straight signal time.

At one endOn a longitudinal road, when a longitudinal straight-going light at a B-type intersection turns green (such as the seventh row in the first row of the signal area in the table 3), vehicles which start to go out are started to go on the longitudinal straight-going light at the B-type intersectionWhen the vehicle runs to an adjacent A-type intersection, the longitudinal straight running lamp of the A-type intersection just turns green; the vehicle can go straight through the class A intersection and continue to run at the average speedWhen the vehicle runs to the next B-type crossing, the longitudinal straight-going lamp of the B-type crossing just turns green. By analogy, a green wave band can be formed on any longitudinal road.

In conclusion, in the whole area, vehicles which run straight on the transverse and longitudinal roads can continuously pass through a plurality of intersections only meeting the red light once, so that the passing effect of the green wave area is realized, and the implementation cost is low.

As traffic peaks approach, the controller may increase T₁～T₄To adapt to the conditions of vehicle increase and vehicle speed reduction; as traffic peaks go far away, the controller may decrease T₁～T₄To accommodate a decrease in vehicle speed, an increase in vehicle speed.

Example 4

The present embodiment is different from the other embodiments in that a road network includes a single road. On the intersection traffic signal control logic, the situation can be regarded as a special situation that one direction of the bidirectional lanes has no traffic flow in other embodiments, and then the vehicle can be indicated to go straight or turn according to intersection signals and the like when going to the intersection in the allowed single direction; in the prohibited direction, it is sufficient that the division of the intersection lane and the traffic signal timing are incorporated into the straight or turning portion in the non-prohibited direction, as shown in fig. 6.

Example 5

As shown in fig. 7, the longitudinal road Z2 is inclined between the transverse roads H1 and H2, resulting in lengthening of the H1 road segment between Z1 and Z2, while shortening of the H1 road segment between Z2 and Z3. In order to cope with the change of the road length, the simplest method is that the control period T is not changed, the recommended average speed calculated according to the formula is increased, and the vehicle runs according to the increased recommended speed. If the average vehicle speed is suggested to approach or exceed the safety threshold, another solution is to change the setting of the transverse duration parameter equal to the longitudinal duration parameter in the control period T, and the specific adjustment method is as follows:

the transverse allowable passage time length of the control period T of the intersection indicated by (2) in fig. 7 becomes shorter, the shortened amount is given to the longitudinal allowable passage time length of the intersection, and the total time length of the period T is not changed. This has the advantage that the vehicle suggested average speed for driving from the intersection (1) to the intersection (2) can be kept constant as a result of the calculation of the formula (1) or the formula (3), because the longitudinal allowable transit time of the intersection (2) becomes longer while the road segment becomes longer; a further advantage is that, as the length of the stretch of H1 between Z2 and Z3 becomes shorter, the number of vehicles that can be accommodated becomes smaller, and therefore it is reasonable to reduce the length of time that the intersection (2) is allowed to pass laterally.

Assume that the road Z1 in fig. 7 has a kindergarten between H2 and H3. The safety speed limit of the road section can be lower than that of a common road, and particularly in the entering and leaving periods, the safety speed limit is equivalent to the lengthening of the road section. One of the solutions for dealing with this situation is that the value of the parameter n in the mother during calculation of the recommended average vehicle speed is larger than the value of the parameter n during calculation of the recommended average vehicle speed on other road sections in the time period. Another way to deal with this situation is to adjust the composition of the relevant intersection control period:

reducing the length of time allowed for longitudinal passage at the intersection (4) to reduce vehicles entering the kindergarten section; and giving off the longitudinally reduced time to the transverse allowable passing time of the intersection (4), and simultaneously reducing the recommended average speed of the transverse next road section of the intersection (4). The control period of the intersection (3) is also adjusted, the longitudinal allowable passing time of the intersection (3) is prolonged, the transverse allowable passing time of the intersection (3) is correspondingly reduced, and the recommended average speed of the left intersection (not shown) of the intersection (3) for driving to the intersection (3) is increased.

Example 6

This example differs from example 2 in that: the right turn lights are additionally arranged on the signal lights of each intersection, and the lighting state of each right turn light is consistent with the lighting state of the left turn light in the signal light corresponding to the next intersection along the current direction, so that the same passing effect as that of the embodiment 2 can be ensured.

Example 7

The present embodiment is different from the foregoing embodiments in that: including a t-junction. The T-shaped road part of the T-shaped intersection only has right-turn and left-turn vehicles, so that the straight signal cycle of the T-shaped road part of the T-shaped intersection is combined to the left-turn lamp of the signal lamp corresponding to the T-shaped road part for green-light use, or is combined to the left-turn lamp of the signal lamp corresponding to the T-shaped road part for green-light use.

The above embodiments have a common technical means: all intersections in the road grid are divided into A, B types and are arranged in a staggered manner in the two-dimensional direction; the controllers of the type A and type B intersections use the same time reference and are required to be updated regularly, the first preference of the same time reference adopts satellite time service, the second preference adopts urban data communication network time service, and the third preference adopts wireless communication base station time service; dividing a plurality of time periods such as idle time periods, peak leveling time periods, peak time periods and the like in one day according to the traffic flow change rule in the road network on the same time reference; in any time period, the controllers of all the type-A intersections synchronously control the traffic lights according to a preset period, and the controllers of all the type-B intersections synchronously control the traffic lights according to a preset period. A. And B, the two controllers cooperatively control the traffic flow in the road network, so that all vehicles in the road network can achieve the green wave band passing effect when the vehicles transversely run straight or achieve the green wave band passing effect when the vehicles longitudinally run straight, and the total passing effect is a two-dimensional green wave zone or green wave network. The invention is a great upgrade of the one-dimensional road green wave band technology, and does not need to construct a huge monitoring network required by other technical schemes, thereby having more implementation value.