冰雪天气下交叉口信号配时优化方法

doi:10.13229/j.cnki.jdxbgxb20210236

摘要/Abstract

摘要：

针对冰雪天气现有配时方案信号控制效益下降导致的交通拥堵问题，从冰雪天气的交通流运行特征入手，分析了在不同降雪量下的交通流参数变化情况。运用多元非线性回归，对现有的韦氏延误计算公式进行修正，采用Vissim软件建立了长春市解放大路与人民大街交叉口晴天与雪天的交通信号控制仿真模型，并进行了案例分析。分析表明：根据降雪量调整的信号配时方案，与仍采用正常天气情况下的信号配时方案相比，能有效降低交叉口处车辆的平均延误，提高交叉口的通行效率。本文分析结果适用于所有冰雪天气环境下的交通信号优化控制。

关键词: 交通运输系统工程, 信号交叉口, 配时优化, 冰雪条件, 交通仿真

Abstract:

In the case of ice and snow weather， the signal control efficiency of the existing signal scheme is substantially reducing， which further leads to the traffic congestion. So starting from the operation characteristics of traffic flow， we analyzed the variation of traffic flow parameters under different snowfall amounts. Using regression fitting， the existing Merriam-Webster delay calculation formula is corrected. Taking the intersection of Jiefang Avenue and Renmin Avenue in Changchun City as an example， Vissim software is used for simulation analysis. The results show that in the ice and snow weather， compared with the signal timing scheme under normal weather conditions， adjusting the signal timing scheme according to the snowfall can effectively reduce the average delay of vehicles at the intersection and improve the traffic efficiency of the intersection. These analysis results are also suitable for the optimal control of traffic signals in all snow and ice weather environments.

Key words: engineering and communications and transportation system, signal intersection, timing optimization, ice and snow conditions, traffic simulation

中图分类号:

U491.5

林赐云,谢天承,覃蔚,郭旭,李正浩,郑臻. 冰雪天气下交叉口信号配时优化方法[J]. 吉林大学学报(工学版), 2022, 52(10): 2316-2324.

Ci-yun LIN,Tian-cheng XIE,Wei QIN,Xu GUO,Zheng-hao LI,Zhen ZHENG. Optimization methods of intersection signal timing parameters under ice and snow condition[J]. Journal of Jilin University(Engineering and Technology Edition), 2022, 52(10): 2316-2324.

图/表 19

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表5

全红时间与黄灯时间推荐值 (s)"

$Δ L m a x$		正常	小雪	中雪	大雪	暴雪
20 m	A	2	3	3	3	3
	AR	2	2	3	3	4
	I	4	5	6	6	7
30 m	A	2	3	3	3	3
	AR	3	3	3	3	4
	I	5	6	6	6	7
40 m	A	2	3	3	3	3
	AR	4	4	4	4	5
	I	6	7	7	7	8
50 m	A	2	3	3	3	3
	AR	4	4	4	4	5
	I	6	7	7	7	8
60 m	A	2	3	3	3	3
	AR	5	5	5	5	6
	I	7	8	8	8	9

表5

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表8

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降雪等级	12 h	24 h
小雪	0.1~1.0 mm	0.1~2.5 mm
中雪	1.1~3.0 mm	2.6~5.0 mm
大雪	3.1~6.0 mm	5.1~10.0 mm
暴雪	>6.0 mm	>10.0 mm

降雪厚度/mm	东	西	南	北	总计
0.0	1398	1126	1480	1500	5504
0.7	1287	1001	1421	1343	5052
0.8	1307	994	1317	1328	4946
1.2	1253	998	1281	1195	4727
1.3	1208	974	1278	1284	4744
1.5	1226	999	1320	1313	4858
1.7	1168	948	1241	1249	4606
1.8	1171	931	1236	1227	4565
1.9	1117	952	1105	1208	4382
2.5	1091	885	1161	1103	4240
3.1	1070	864	1119	1121	4174
5.2	1024	826	1104	1094	4048
5.5 6.3 6.7 7.5 8.3 9.7 10.6 11.2 12.1	1038 1018 992 977 925 910 898 862 918	793 817 777 729 788 716 740 782 736	1057 1011 1011 1018 1030 886 898 872 901	1068 1026 1008 977 871 1016 905 892 825	3956 3872 3788 3701 3614 3528 3441 3408 3380
12.3	943	767	832	811	3353

降雪强度/mm	交通量衰减百分比/%
小雪（0.1~2.5 ）	9~20
中雪（2.6~5.0 ）	20~26
大雪（5.1~10.0 ）	26~33
暴雪（>10 ）	33~40

实际值/s	理论值/s	误差/%
MAPE=10.46
70	76	8.57
75	81	8.00
68	62	8.82
63	66	4.76
65	54	16.92
64	55	14.06
83	72	12.05

进口道	转向	小车/pcu	大车/pcu
东	左	228	12
	直	864	48
	右	192	16
西	左	256	12
	直	428	4
	右	340	52
南	左	416	8
	直	872	40
	右	120	0
北	左	172	8
	直	112	64
	右	72	16