Calculation method of pedestrian signal advance time at signalized intersection
A technology of advance time and calculation method, which is used in the control of traffic signals, control with pedestrian lights, traffic control systems, etc., and can solve problems such as conflicts between pedestrians and turning vehicles at signalized intersections
Inactive Publication Date: 2018-06-08
JILIN UNIV
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[0003] The technical problem to be solved by the present invention is to overcome the conflict between pedestrians and turning vehicles at signalized intersections in the prior art, and to provide a method for calculating the advance time of pedestrian signals at signalized intersections
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[0141] 1. Data collection and analysis
[0142] 1) Pedestrian crossing conditions
[0143] At the survey site, the investigators measure the geometric parameters, timing parameters and traffic flow parameters of the intersection with tools such as tape measure and stopwatch, and obtain the coordinates of the arrival position of pedestrians through video tracking technology. The parameters obtained are as follows:
[0144] (1) The width of the pedestrian crossing is d = 8 meters;
[0145] (2) The length of the pedestrian crossing L=43 meters;
[0146] (3) intersection angle θ = 90 degrees;
[0147] (4) Intersection corner radius R c = 5 meters;
[0148] (5) The distance D from the curb to the center of the entrance lane is 3 meters;
[0149] (6) Intersection signal period length C = 129, the unit is second;
[0150] (7) The duration of the pedestrian phase green light g=46, the unit is second;
[0151] (8) The difference between the intersection signal cycle duration an...
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The invention discloses a signal intersection leading pedestrian interval calculation method. The objective of the invention is to solve the problem of the conflict of pedestrians and vehicles in cornering a signal intersection. The method includes the following steps that: 1, data are acquired, and pedestrian arrival laws are analyzed; 2, pedestrian dissipation time is calculated; 3, right-turning vehicle trajectory length is calculated; and 4, a leading pedestrian interval is calculated according to a calculation formula which is mentioned in the descriptions of the invention. The first step of the method further includes the following steps of: 1) data acquisition: a. pedestrian crosswalk width d, b. pedestrian crosswalk length L, c. intersection angle theta, d. intersection corner radius Rc, e. the distance D from the edge of a road to the center of an entrance lane, f. signal period length C, g. pedestrian green light time g, h. the difference C-g of the period length and the pedestrian green time, i. the average speed v (right turning) of right-turning vehicles, j. the average speed u0 of arrival pedestrians, k. the average speed us of released pedestrians, l. pedestrian arrival rate A, m. pedestrian release rate Qd, n. pedestrian blocking density Kj, persons / square meter, o. lane width th, and p. parking lane width ph, are acquired; and 2) pedestrian arrival position distribution equation establishment.
Description
technical field [0001] The invention relates to a method for calculating pedestrian signal time in traffic management, more precisely, the invention relates to a method for calculating advance time of pedestrian signal at signalized intersections. Background technique [0002] At signalized intersections, the conflict between pedestrians and turning vehicles seriously threatens the safety of pedestrians crossing the street. To deal with this problem, when the flow of pedestrians and turning vehicles is large, turning vehicles can be prohibited from passing at red lights, and the LPIs (leading pedestrian intervals) method is used to make the green lights of pedestrians turn on for a period of time earlier than the green lights of turning vehicles. In order to reasonably set the time for the green light to turn on in advance, a reasonable method is needed as a guide. However, although a large number of studies have proved the effectiveness of LPIs, so far, there are no compre...
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IPC IPC(8): G08G1/08G08G1/005G08G1/01
CPCG08G1/005G08G1/0125G08G1/08
Inventor 曲昭伟曹宁博陈永恒宋现敏李志慧陶鹏飞魏巍邓晓磊罗瑞琪白乔文
Owner JILIN UNIV