Citation

Radwan AE, Hurley Jr. JW. Transp. Res. Rec. 1982; 881: 59-65.

Copyright

(Copyright © 1982, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

unavailable

PMID

unavailable

Abstract

Productivity enhancement of public transportation is an essential goal, and bus signal preemption at intersections is one of the transportation system management strategies that strives for this goal. Improvements in bus speed and reductions in delay are the anticipated benefits accrued from such strategy. A macroscopic traffic delay model, which applies stochastic procedure, is presented to evaluate different bus preemption signal strategies at an isolated intersection. The model permits the user to evaluate a certain operational strategy provided for bus traffic on both main and cross streets. The signal controller modeled in this paper has a green extension and red truncation capabilities. A comparison between preemption on both main and cross street and preemption on main street only is provided to validate the model's logic. Sensitivity analyses were implemented and it was found that the delay savings due to signal preemption are sensitive to saturation flow rate and to bus passenger load. Potential applications and further enhancement are suggested. (Author)

Record URL:
http://onlinepubs.trb.org/Onlinepubs/trr/1982/881/881-010.pdf

Language: en

Keywords

TRAFFIC SIGNS, SIGNALS AND MARKINGS; MOTOR BUS TRANSPORTATION; ROADS AND STREETS - Intersections; TRAFFIC SURVEYS