Cooperative lane change guidance strategy in freeway traffic accident area based on safety potential field theory

doi:10.16265/j.cnki.issn1003-3033.2024.07.0069

Abstract

Abstract:

In order to mitigate the impact of traffic accidents on the operation efficiency of freeways, and improve the throughput capacity of the accident area, based on real-time information via vehicle-to-vehicle and vehicle-to-road, a cooperative lane change guidance strategy in freeway traffic accident areas was proposed with the safety potential field theory. Firstly, in view of various traffic accidents in different lanes in two-lane or multi-lane traffic of one-way, the guidance area of collaborative lane change was divided into four areas: accident protection area, guidance transition area, collaborative lane change guidance area and free lane change area. The guidance threshold of lane change was determined to update vehicle status. Furthermore, the safety potential field of traffic accidents was established, and the corresponding guidance strategies of vehicle cooperative lane change were proposed according to different scenarios. The calculation methods of the safe distance for vehicle lane change and the latest lane change position were given. Finally, based on simulation of urban mobility (SUMO) software, the simulation results were verified in various scenarios. The results show that in the two-lane of one-way scenario, the optimization effect is most obvious when the vehicle cooperative guidance rate is at 75%. In the multi-lane of one-way scenario, the optimization effect is most obvious when the guidance rate is at 50%. Meanwhile, through comparative analysis, it is found that the average speed of vehicles passing through the accident section is increased by up to 6.3% and the maximum vehicle delay is reduced by 14.6% after adopting the lane change guidance strategy.

Key words: safety potential field theory, freeway, traffic accident, collaborative lane change, guidance strategy

CLC Number:

YAO Jiao, YANG Chengyi, YANG Yuanyuan, LI Junjie, ZHU Xiaoxiao. Cooperative lane change guidance strategy in freeway traffic accident area based on safety potential field theory[J]. China Safety Science Journal, 2024, 34(7): 71-82.

Figures/Tables 12

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引导率/ %	单向2车道
	事故发生在内侧车道		事故发生在外侧车道
	速度/(m·s^-1)	延误/s	速度/(m·s^-1)	延误/s
0	13.97(↑0.0%)	3.54(↓0.0%)	13.87(↑0.0%)	3.76(↓0.0%)
25	13.95(↓1.4%)	3.62(↑2.3%)	13.75(↓0.8%)	3.82(↑1.6%)
50	13.62(↓2.4%)	3.52(↓2.8%)	13.91(↑1.2%)	3.73(↓2.4%)
75	14.21(↑4.3%)	3.21(↓8.8%)	14.32(↑2.9%)	3.32(↓11.0%)
100	14.52(↑2.2%)	3.02(↓5.9%)	14.37(↑0.3%)	3.28(↓1.2%)

引导率/ %	单向多车道
	事故发生在外侧车道		事故发生在中间车道		事故发生在内侧车道
	速度/(m·s^-1)	延误/s	速度/(m·s^-1)	延误/s	速度/(m·s^-1)	延误/s
0	13.80(↑0.0%)	3.7(↓0.0%)	13.94(↑0.0%)	3.6(↓0.0%)	13.95(↑0.0%)	3.4(↓0.0%)
25	13.65(↓1.1%)	3.82(↑0.1%)	14.11(↑1.2%)	3.59(↓1.6%)	14.09(↑0.4%)	3.52(↑2.9%)
50	14.16(↑3.7%)	3.56(↓6.8%)	14.18(↑0.5%)	3.51(↓2.2%)	14.41(↑2.3%)	3.30(↓6.2%)
75	14.48(↑2.3%)	3.45(↓3.0%)	14.46(↑2.0%)	3.34(↓4.8%)	14.43(↑0.1%)	3.21(↓2.7%)
100	14.56(↑0.5%)	3.38(↓2.0%)	14.52(↑0.4%)	3.29(↓1.5%)	14.51(↑0.5%)	3.18(↓0.9%)

车辆状态	事故发生在内侧车道		事故发生在外侧车道
车辆状态	未采用换道策略	采用换道策略	未采用换道策略	采用换道策略
开始引导的位置/m	—	120	—	120
引导车辆的平均速度/(m·s^-1)	13.55	14.40	13.81	14.35
行程时间/s	80	71	85	73
延误/s	3.54	3.02	3.76	3.23

车辆状态	事故发生在外侧车道		事故发生在中间车道		事故发生在内侧车道
车辆状态	未采用换道策略	采用换道策略	未采用换道策略	采用换道策略	未采用换道策略	采用换道策略
开始引导的位置/m	—	150	—	150	—	150
引导车辆的平均速度/(m·s^-1)	13.80	14.48	13.94	14.46	13.95	14.36
行程时间/s	78	70	76	72	75	72
延误/s	3.78	3.45	3.65	3.34	3.42	3.11