Road-safety recognition and network equilibrium with perceived route-choice sets
- 点击次数：
- DOI码：10.1093/tse/tdz009
- 发表刊物：Transportation Safety and Environment
- 关键字：safety recognition; risk circumvention; network-equilibrium analysis; perceived route-choice set
- 摘要：Safety is regarded as the second basic need in Maslow’s hierarchy of needs (1943), and safety
recognition and circumvention behaviour in the route-choice decision-making process should
therefore be accommodated in network-traffic equilibrium analysis frameworks. This paper
proposes a framework by which crash frequency, forecasted using the safety-analysis method or
compiled from historical data for intersections, is used to measure the safety consciousness of
drivers. Drivers are then classified into different groups according to their acceptable-risk
thresholds, and each group has its own route-choice set. Decision behaviour whereby drivers are
willing to bear additional costs in order to circumvent travel risk is incorporated into the
variational inequality model based on the user equilibrium in the perceived route-choice set
(UE-PRCS), which is an extension of Wardrop’s first principle. The Frank–Wolfe algorithm, based on
the convex combination method, is employed to obtain the solution. A small road network is used
as a case study to illustrate the proposed framework, incorporating risk recognition and
circumvention behaviour under different combinations of traffic demand and risk-sensitivity group
ratio. The results show that the standard user equilibrium is a special case of the UE-PRCS, but that
the UE traffic state is more common than the UE-PRCS under different parameters.
- 论文类型：期刊论文
- 学科门类：交通运输工程
- 文献类型：J
- 卷号：1
- 期号：2
- 是否译文：否
- 发表时间：2019-05-23
