01556896

Component

This paper attempts to design optimal speed limit schemes by considering heterogeneous travelers’ non-obedient behaviors in speed selection. The subjective travel time cost, the perceived crash risk, and the perceived ticket risk of travelers are all taken into account as determinant factors for travelers’ actual speed selection. Speeds that can minimize the perceived disutility are preferred by travelers. Although the perceived disutility function of heterogeneous users is altered after considering speed deviation, the uniqueness of link travel time at user equilibrium remains valid, and the equilibrium link flows are still unique for links with non-optimal speed selection. Furthermore, the authors can extend the link speed selection to develop a traffic network user equilibrium model with link-specific speed limit. A tri-objective bi-level model with heterogeneous user equilibrium constraint is proposed for optimal speed limits design to simultaneously minimize total travel time, total crash risk and total vehicular emission. The models and algorithms are illustrated by some numerical examples. This study is expected to be useful for designing optimal speed limit schemes by analyzing drivers’ speed selection.

This paper was sponsored by TRB committee AHB50 Traffic Control Devices.

01550057

15-2028

English

0000-0002-6262-5343

19p

2015

Transportation Research Board 94th Annual Meeting

Digital/other

Figures; References; Tables

Algorithms; Exhaust gases; Mathematical models; Optimization; Speed limits; Traffic equilibrium; Travel time

Crash risk; User equilibrium

Highways; Operations and Traffic Management; Planning and Forecasting; I72: Traffic and Transport Planning

Transportation Research Board Annual Meeting 2015 Paper #15-2028

TRIS, TRB, ATRI

Dec 30 2014 12:44PM