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Road-safety recognition and network equilibrium with perceived route-choice sets

Transportation Safety and Environment 2019年第2期1卷 126-134页

作者： Mao-sheng Li He-lai Huang School of Traffic and Transportation Engineering Central South UniversityNo.68 South Shaoshan RoadChangsha City 410075HunanChina

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 *** 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 *** are then classified into different groups according to their acceptable-risk thresholds,and each group has its own route-choice *** 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 *** 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 *** 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.

关键词： safety recognition risk circumvention network-equilibrium analysis perceived route-choice set

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