阅读说明：本技术 一种组合借道左转和搭接相位的逆时针放行方法 (Counterclockwise releasing method for combined lane borrowing left turn and lap joint phase ) 是由 刘喜敏 卢守峰 成晟 陈刚 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种组合搭接相位和借道左转的逆时针放行方法,包括以下步骤：(1)设置借道左转车道的起始位置；(2)东进口直行左转放行绿灯；(3)东进口直行、西进口直行放行绿灯,北进口左转车辆驶入借道左转车道；(4)南进口直行、北进口直行放行绿灯,西进口左转车辆驶入借道左转车道；(5)西进口直行、左转放行绿灯,南进口左转车辆驶入借道左转车道；(6)南进口直行、左转放行绿灯。以上步骤显示以东进口作为放行的起点。当选择其他进口作为放行的起点时,放行顺序仍是逆时针。本发明所述方法可以较大提高过饱和交叉口的通行效率,缓解拥堵,具有更好的适应性。(The invention discloses a combined overlapping phase and left-turning lane-borrowing anticlockwise releasing method, which comprises the following steps of: (1) setting the starting position of a left-turn lane of a lane borrowing; (2) the east import goes straight and turns left to let green light go; (3) green lights are released in the straight-going of the east entry and the straight-going of the west entry, and left-turning vehicles at the north entry drive into a left-turning lane of the borrowed lane; (4) the green lights are directly released by the south entrance and the north entrance, and the vehicles turning left at the west entrance drive into the left-turning lane of the borrowed lane; (5) the west entrance goes straight, turns left and releases the green light, the south entrance left turn vehicle drives into the left turn lane of the borrowed road; (6) the south enters the green light of going straight, turning left and letting go. The above steps show east import as the starting point for release. When the other imports are selected as the starting point for the release, the release sequence is still counter-clockwise. The method can greatly improve the passing efficiency of the oversaturated intersection, relieve congestion and have better adaptability.)

1. A combined lap phase and left-turn lane counterclockwise passing method, taking a cross intersection as an example, is characterized by comprising the following steps:

step A: and setting the starting position of the left-turning lane of each inlet according to the left-turning traffic flow and the left-turning green light time, and ensuring that the left-turning vehicles in the lane are emptied in the left-turning green light time.

And B: the green light is released by the eastern import straight-going and left-turning, and the green light is released by the pedestrian crossing the street in the north side.

And C: the green lights are released when the vehicles at east and west enter the left-turn lane, and the pedestrians cross the street and release the green lights at the south and north sides.

Step D: the green light is released by the straight-going left-turning green light at the north entrance, and the green light is released by the pedestrians on the west side crossing the street.

Step E: the green lights are released when the south and north entrances go straight, the vehicles turning left at the west entrances drive into the left-turning lane of the borrowed road, and the pedestrians cross the street at the east and west sides.

Step F: the green light is released when the west entrance goes straight and turns left, the vehicles turning left at the south entrance drive into the left-turning lane of the borrowed road, and the green light is released when the pedestrians on the south side cross the street.

Step G: the green light is released when the south enters the road and turns left, vehicles turning left at the east enter the lane for the left turn of the borrowed road, and the green light is released when the east people cross the street.

2. The above steps select to first release east entry. When the north import is selected to be released first, the release step is similar. When the west import is selected to be released first, the releasing step is similar. When the south import is selected to be released first, the release step is similar.

Technical Field

The invention provides a counterclockwise releasing method for a combined lane-borrowing left turn and lap joint phase, and belongs to the technical field of traffic.

Background

To separate traffic conflicts at level intersections, signal light control is a commonly used traffic technology. The existing signal control technology of the intersection comprises timing control, induction control and self-adaptive control. With the increase of the quantity of motor vehicles kept in China, the traffic jam at the intersection is normal in the morning and evening peak commuting period, and the traffic jam trend is increased year by year. In addition, the urban land area is limited, so that more roads are difficult to construct. In order to fully utilize the existing road resources, a method for improving the traffic capacity by using an opposite lane is proposed in the literature, and a typical effective mode is to utilize the opposite lane to a free lane by using a left turn, so as to fully utilize the road space resources. For example, the invention patent "a traffic indicating system and a control method for left turn at a lane borrowing at an intersection" (application number 201510675428.0) designs signal lamps, guardrails and traffic marking lines for left turn at the lane borrowing in detail. The invention patent (application No. 202010215384.4, application No. 201610164786.X) studied the problems of the location of the pre-stop line for the left turn by the lane and the timing of the pre-signal lights. Efforts have been made primarily around the safe and reliable implementation of a lane-borrowing left-turn system to improve driver compliance and avoid the lane-borrowing vehicle being trapped in an oncoming lane.

The existing release method applying the left-turning lane-borrowing signal can be summarized as a release method of 'turning left first and then going straight', namely when the straight-going vehicles are released, the left-turning vehicles in the cross direction enter the left-turning lane-borrowing. Taking a crossroad as an example, when the straight-going vehicles in the east-west direction are released, the vehicles turning left in the south-north direction enter the lane borrowing left-turning area and then are released along with the vehicles turning left in the south-north direction on the conventional left-turning lane. When the south-north straight-going vehicle is released, the east-west left-turning vehicle enters the lane-borrowing left-turning area and then is released along with the east-west left-turning vehicle on the conventional left-turning lane. The phase sequence is as follows: east-west left turning, east-west straight going, south-north left turning, south-north straight going. Or turning left to north and south, going straight to north and south, turning left to east and west, going straight to east and west. In practice, either a portion of the imports take a left turn by lane or all imports take a left turn by lane.

The existing release method of the combination of lane-borrowing left turning and 'left turning and then straight going' is only suitable for the condition that the flow of the opposite straight going vehicles is basically equal and the flow of the opposite left turning vehicles is basically equal. For the following two cases, the release efficiency is low, and there is a defect. The two situations are ubiquitous in large and medium cities in China.

First, when the traffic volume difference between the oncoming traffic is large, the performance of the above release method is greatly impaired, and it is difficult to exert the advantage of the left-turn lane lending.

Secondly, in large and medium cities in China, the turning is arranged near more intersection stop lines, so that the turning vehicles often occupy left-turn lanes, queue with the left-turn vehicles and block each other. When the queuing length exceeds the left-turn lane widening section, the passing of straight vehicles is influenced. When the left turn green light is released, the u-turn vehicle takes more time, resulting in the left turn vehicle being behind.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a combined lap joint phase and a left-turn lane-borrowing anticlockwise releasing method, and solves the problems that the opposite flow at an intersection is unbalanced, and vehicles turning around and left-turn vehicles are blocked mutually.

Taking a cross-shaped intersection as an example, the invention comprises the following steps:

step A: and setting the starting position of the left-turning lane of each inlet according to the left-turning traffic flow and the left-turning green light time, and ensuring that the left-turning vehicles in the lane are emptied in the left-turning green light time.

And B: the green light is released by the eastern import straight-going and left-turning, and the green light is released by the pedestrian crossing the street in the north side.

And C: the green lights are released when the vehicles at east and west enter the left-turn lane, and the pedestrians cross the street and release the green lights at the south and north sides.

Step D: the green light is released by the straight-going left-turning green light at the north entrance, and the green light is released by the pedestrians on the west side crossing the street.

Step E: the green lights are released when the south and north entrances go straight, the vehicles turning left at the west entrances drive into the left-turning lane of the borrowed road, and the pedestrians cross the street at the east and west sides.

Step F: the green light is released when the west entrance goes straight and turns left, the vehicles turning left at the south entrance drive into the left-turning lane of the borrowed road, and the green light is released when the pedestrians on the south side cross the street.

Step G: the green light is released when the south enters the road and turns left, vehicles turning left at the east enter the lane for the left turn of the borrowed road, and the green light is released when the east people cross the street.

The above steps select to first release east entry. When the north import is selected to be released first, the release step is similar. When the west import is selected to be released first, the releasing step is similar. When the south import is selected to be released first, the release step is similar.

The invention has the advantages of

The invention carries out lap joint on two phases of single-port release and bidirectional straight travel, and 1 solves the problem of vehicle release under the condition of unbalanced opposite flow. 2. The problem that the U-turn vehicle and the left-turn vehicle block each other is solved.

The invention combines the lapping phase and the lane borrowing left turn, can flexibly select the inlet for implementing the lane borrowing left turn according to the actual flow demand, and has stronger applicability.

Drawings

FIG. 1 is a schematic view of a left-turn lane for lane borrowing according to the present invention

FIG. 2 is a schematic diagram of the phase of the present invention released counterclockwise

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1, a cross-shaped intersection is taken as an example for explanation, the intersection is provided with a green belt central isolation in the east-west direction, and is provided with an isolation fence central isolation in the north-south direction. The first opposite lane near the central isolation facility is a left-turn lane for borrowing, and the ground is marked with a 'left-turn lane for borrowing' mark. The opening position of the left-turn lane driving to the borrowed lane is determined according to the number of vehicles which can pass through the left-turn green light time in the direction, for example, the left-turn green light time at east is 25 seconds, the average headway time during the green light period is 2.2 seconds, and 11 vehicles can pass through each lane during the left-turn green light period. To avoid the vehicles loaning to the left due to volatility being stuck, 2 vehicles are conservatively subtracted, so the opening location for the left lane loaning is selected from the location where the stop line lines line up to the 9 th vehicle. According to the phase diagram of the counterclockwise passing shown in fig. 2, when the south entrance is straight and the south entrance left-turn green light is passed, the east entrance left-turn vehicle can drive into the left-turn lane, and usually the left-turn lane-passing signal light or information screen is adopted to inform the driver. In the next phase, the east entry left turn and east entry straight green lights go, waiting for the vehicles in the left turn lane and the conventional left turn lane to make a left turn together. Other entrances are similarly cleared.

When the queuing length of left-turn and turning-around vehicles exceeds the widening section, the straight-going vehicles are prevented from driving into a straight-going lane, and the phenomenon is common at intersections where the main road and the main road intersect. The existing release method of 'turning left first and then going straight' is characterized in that when the left turn is released, straight going, left turning and turning-around vehicles are mixed together, so that more time is occupied for lane changing, and the passing efficiency is lower. The invention is shown in figure 2 with 6 phases, wherein phase 1 and phase 2 are east-west lap phases and phase 3 and phase 4 are north-south lap phases. When the green light of phase 1 is released, the vehicle turning around turns around by utilizing the left turn opening of the lane, and the straight vehicle behind the widening section can drive into the straight lane along with the left turn before the widening section and the emptying of the vehicle turning around. Since the straight-going vehicles are already in line in the straight-going lane during the phase 1 green light release, high-efficiency release can be realized when the east-west straight-going is released in the phase 2, thereby improving the overall passing efficiency.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and any simple modifications or equivalent substitutions of the technical solutions that can be obviously obtained by those skilled in the art within the technical scope of the present invention are within the scope of the present invention.