A Method of Entrance Design and Signal Optimization to Eliminate Startup Lost Time

Abstract

The invention discloses an entrance lane design method for eliminating starting loss time and a signal optimization method. The entrance lane design method is characterized by comprising the following steps: S1, acquiring data of an intersection, including the design speed at the intersection, the conflict point position of the intersection, the driving track distance from each lane at the intersection to the conflict point, the vehicle acceleration time, the deceleration time, and the acceleration or deceleration distance; S2, adding multiple groups of parking lines to each lane of the entrance lane at the intersection; and S3, setting signal lights at set distances along the heading direction of vehicles on each newly added parking line. The traffic flow completes acceleration in the entrance lane under control. Under the condition of avoiding conflict with the traffic flow of previous phase, the traffic flow is enabled to pass through the intersection at a saturation flow rate in the green light time. The signal loss time at the start of the green light and the signal loss time at the end of the yellow light are eliminated. The green time at intersections is utilized efficiently. The traffic capacity and service level at intersections are maximized. The traffic delay is reduced.

Description

technical field [0001] The invention relates to the technical field of urban traffic design and traffic control, in particular to an entrance road design and signal optimization method for eliminating the lost time of starting. Background technique [0002] With the rapid development of urban traffic and the continuous increase of car ownership, the burden of urban intersections is increasing. Improving the capacity of intersections has become the primary goal of improving the urban traffic environment. The rational and efficient optimization of intersections is becoming more and more important. The methods to improve the capacity of intersections mainly include: signal control optimization, traffic design optimization and traffic management optimization. [0003] At the beginning of the green light of the signal light, due to the start-up and acceleration of the vehicles at the intersection entrance, as well as the start-up wave formed by successive starts, the first few se...

AI Technical Summary

Problems solved by technology

[0006] 1. The traffic flow state of each signal cycle is different, and the signal time difference is calculated by predicting the traffic flow, and the error is large;

[0007] 2. The interval between parking lines can be set randomly. If the interval is too long, space resources will be wasted. If the interval is too short, the acceleration distance of the vehicle will be insufficient;

[0008] 3 The vehicles closest to the stop line must complete the acceleration at the intersection, and the start-up loss time of these vehicles has not been eliminated;

[0009] 4. Failure to consider the difference in vehicle speed in each lane at the intersection will cause traffic flow disorder at the intersection and increase internal conflicts;

[0010] 5. The traffic flow starts from near to far from the intersection, which will cause the green light to be empty, waste the time and space resources of the intersection, and cannot realize the saturation of the traffic flow;

[0011] 6. The time loss of yellow powder has not been eliminated, and improvement is still needed

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