01372933

Component

In general, traffic assignment for large-scale road networks entails significant computational cost. In addition, the mathematical problem with equilibrium constraints (MPEC) (e.g., an optimal toll decision) requires iteration of traffic assignment. It is important to reduce the computational cost, especially in optimal toll and other MPEC problems. In this study, route-based traffic assignment is considered to examine the route-based toll policy. In this case, accurate tolled road flows are needed; however, the same level of accuracy is not required for non-tolled roads. Thus, aggregation of routes that consist solely of non-tolled roads helps to reduce the computational cost. The authors propose a method for aggregating non-tolled general road routes using sensitivity analysis. The proposed method is applied to a simple network, and its validity and computational time reduction are examined. As a result, this method reduces the computational time by 99% under an acceptable approximation error in the simple network example.

This paper was sponsored by TRB committee ADB30 Transportation Network Modeling

01362476

12-3231

English

13p

2012

Transportation Research Board 91st Annual Meeting

Digital/other

Figures; References; Tables

Expressways; Road pricing; Sensitivity analysis; Stochastic processes; Tolls; Traffic assignment; Traffic equilibrium

Stochastic user equilibrium models

Finance; Highways; Planning and Forecasting; I72: Traffic and Transport Planning

Transportation Research Board Annual Meeting 2012 Paper #12-3231

TRIS, TRB

Feb 8 2012 5:15PM