吉林大学学报(工学版) ›› 2022, Vol. 52 ›› Issue (10): 2316-2324.doi: 10.13229/j.cnki.jdxbgxb20210236

• 交通运输工程·土木工程 • 上一篇    

冰雪天气下交叉口信号配时优化方法

林赐云(),谢天承,覃蔚,郭旭,李正浩,郑臻   

  1. 吉林大学 交通学院,长春 130022
  • 收稿日期:2021-03-22 出版日期:2022-10-01 发布日期:2022-11-11
  • 作者简介:林赐云(1980-),男,副教授,博士.研究方向:智能交通.E-mail: linciyun@jlu.edu.cn
  • 基金资助:
    国家自然科学基金项目(51408257)

Optimization methods of intersection signal timing parameters under ice and snow condition

Ci-yun LIN(),Tian-cheng XIE,Wei QIN,Xu GUO,Zheng-hao LI,Zhen ZHENG   

  1. College of Transportation,Jilin University,Changchun 130022,China
  • Received:2021-03-22 Online:2022-10-01 Published:2022-11-11

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

表1

降雪等级分类表"

降雪等级12 h24 h
小雪0.1~1.0 mm0.1~2.5 mm
中雪1.1~3.0 mm2.6~5.0 mm
大雪3.1~6.0 mm5.1~10.0 mm
暴雪>6.0 mm>10.0 mm

表2

不同降雪厚度与各个方向交通量数据表"

降雪厚度/mm西总计
0.013981126148015005504
0.712871001142113435052
0.81307994131713284946
1.21253998128111954727
1.31208974127812844744
1.51226999132013134858
1.71168948124112494606
1.81171931123612274565
1.91117952110512084382
2.51091885116111034240
3.11070864111911214174
5.21024826110410944048

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

12.39437678328113353

图1

交通量与降雪厚度的关系"

图2

东-西方向交通量变化"

图3

南-北方向交通量变化"

表3

不同降雪强度下的交通量衰减程度"

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

图4

交叉口饱和度与降雪厚度的关系"

图5

速度与降雪厚度的关系"

表4

冰雪天气下延误分析"

实际值/s理论值/s误差/%
MAPE=10.46
70768.57
75818.00
68628.82
63664.76
655416.92
645514.06
837212.05

图6

韦氏计算延误与实际延误的对比"

图7

延误拟合"

表5

全红时间与黄灯时间推荐值 (s)"

ΔLmax正常小雪中雪大雪暴雪
20 mA23333
AR22334
I45667
30 mA23333
AR33334
I56667
40 mA23333
AR44445
I67778
50 mA23333
AR44445
I67778
60 mA23333
AR55556
I78889

图8

人民大街-解放大路交叉口渠化图"

表6

人民大街-解放大路交叉口正常时流量"

进口道转向小车/pcu大车/pcu
22812
86448
19216
西25612
4284
34052
4168
87240
1200
1728
11264
7216

图9

人民大街-解放大路交叉口配时图"

表7

仿真延误对比"

实际值/s仿真值/s误差/%
MAPE=12.85%
706310.00
756612.00
685716.18
63604.76
655318.46
645514.06
837114.46

图10

周期与延误关系"

图11

修正后人民大街-解放大路交叉口配时图"

表8

延误对比"

仿真时长/s正常配时平均延误/s新方案平均延误/s
30055.347.1
40079.450.3
50090.969.7
60095.268.9
70079.868.7
80083.671.8
900105.982.5
100089.668.9
1100101.270.4
120078.769.4
130071.665.2
140087.380.9

1500

1600

1700

1800

96.6

80.4

86.2

95.7

87.4

75.2

77.1

78.1

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