Volume 39 Issue 1
Feb.  2021
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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. doi: 10.3963/j.jssn.1674-4861.2021.01.006
Citation: 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. doi: 10.3963/j.jssn.1674-4861.2021.01.006

A Traffic Impact Analysis of Urban-road Traffic Accidents Based on Coupling Influences of Accident Characteristics

doi: 10.3963/j.jssn.1674-4861.2021.01.006
  • Received Date: 2020-09-10
  • Publish Date: 2021-02-28
  • 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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