Citation

Chang GL, Wu J, Lieu H. Transp. Res. Rec. 1994; 1452: 42-51.

Copyright

(Copyright © 1994, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

An integrated optimal control model has been formulated to address the dynamic freeway diversion control process. An effective and efficient approach is developed for simultaneously solving diversion control measures, including on-ramp metering rates, off-ramp diversion rates, and green/Cycle ratios for traffic signals on a real-time basis. By approximating the flow-density relation with a two segment linear function, the nonlinear optimal control problem can be simplified into a set of piecewise linear programming models and solved with the proposed successive linear programming algorithm. Consequently, an effective on-line feedback approach has been developed for integrated real-time corridor control. Preliminary simulation results with INTRAS for a sample network have demonstrated the merits of the proposed model and algorithm.

Language: en

Keywords

Mathematical models; Traffic signals; Algorithms; Optimization; Highway traffic control; Computer simulation; Roads and streets; Linear programming; Nonlinear control systems; Online systems; Optimal control systems; Piecewise linear techniques; Real time systems