| 基于事故特征耦合影响的城市道路交通事故影响分析 |
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| 引用本文： | 何雅琴,邹家翠.基于事故特征耦合影响的城市道路交通事故影响分析[J].交通信息与安全,2021,39(1):45-51,63. |
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| 作者姓名： | 何雅琴 邹家翠 |
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| 作者单位： | 武汉科技大学汽车与交通工程学院 武汉 430065 |
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| 摘 要： | 城市道路交通事故发生后，由于事故车辆占用车道，使得车辆通行的车道数目减少，道路的通行能力降低，造成排队和交通拥堵，对交通运行产生一定的影响。以双向6车道的城市道路为例，运用Vissim仿真软件模拟交通事故下的交通运行，分析车流量、占道类型、事故持续时间以及借道超车4种因素下的交通影响。结果表明，流量越大、事故持续时间越长、占道数目越多，事故对交通的影响越大。当流量达到3 400 veh/h（D级服务水平），占1个车道的车辆延误显著增加，直至流量达到4 000 veh/h时才逐渐趋于平稳，且占据车道2比占据车道1和占据车道3的延误要大；当流量达到1 900 veh/h（B级服务水平），占2条车道的车辆延误显著增加直至流量达到2 700 veh/h时才逐渐趋于平稳，占据车道1和3的车辆延误要小于占据车道1和2以及占据车道2和3的延误；在相同占道情况下，不同事故持续时间下的车辆延误随流量变化的趋势大体是一致的；当事故道路服务水平为D/E/F级，对向道路服务水平在A/B/C/D级时（事故占用内侧1个车道），以及当对向道路服务水平在A/B/C级时（事故占据内侧2个车道），进行借道超车均能有效减少事故路段车辆延误。
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| 关 键 词： | 城市交通 交通事故 交通影响 Vissim仿真 借道超车 |
| 收稿时间： | 2020-09-10 |
A Traffic Impact Analysis of Urban-road Traffic Accidents Based on Coupling Influences of Accident Characteristics |
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| HE Yaqin,ZOU Jiacui.A Traffic Impact Analysis of Urban-road Traffic Accidents Based on Coupling Influences of Accident Characteristics[J].Journal of Transport Information and Safety,2021,39(1):45-51,63. |
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| Authors: | HE Yaqin ZOU Jiacui |
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| Affiliation: | School of Automobile and Traffic Engineering, Wuhan University of Science and Technology, Wuhan 430065, China |
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| Abstract: | After an urban road traffic accident, the number of lanes for the vehicle to pass and the capacity of urban roads are reduced due to lane occupation by accident vehicles. It causes queuing and traffic congestion, which affects traffic operations. A two-way six-lane urban road is taken as a case study. The traffic operation under traffic accidents is simulated by Vissim simulation software, with the traffic impact under four factors analyzed: traffic flow, occupation type, incident duration, and overtaking on the lane. The results show that greater traffic flow means longer incident duration, more occupied roads, and greater traffic accidents. When the traffic volume reaches 3 400 veh/h(level-D service), the delay of vehicles occupying one lane increases significantly until the traffic volume reaches 4 000 veh/h; the delay of occupying lane 2 is greater than that of occupying lanes 1 and 3. When the traffic volume reaches 1 900 veh/h(level-B service), the delay of vehicles occupying two lanes increases significantly until the traffic volume reaches 2 700 veh/h, which gradually stabilizes. Under the same occupation situation, vehicle delays with the traffic flow under different incident durations are generally the same. When the service levels of the accident road are D, E, and F, with the service levels A, B, C, and D of the opposite road(the accident occupies one lane inside)and the service levels A, B, and C of the opposite road(the accident occupies two lanes inside), tailgating and overtaking can reduce the vehicle delay on the accident road section. |
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