00495481

Component

http://onlinepubs.trb.org...trr/1989/1244/1244-005.pdf

https://scholar.google.co...llen&publication_year=1989

In this paper, the EVIPAS simulation and optimization model was used to analyze vehicle-actuated traffic signals. The variables studied were detector type and placement and the settings were for minimum green and vehicle extension. The evaluation criterion was minimum average vehicle delay. The study shows that the optimum design of a vehicle-actuated signal is specific for some variables but is relatively unaffected by others. The design is critical only for high traffic volumes. At low volumes, vehicle delay is relatively unaffected by the design parameters studied in this paper. The most critical variable is vehicle extension, particularly for passage detectors, where it should be at least 4.0 seconds regardless of detector placement and approach speed. For a presence detector, a short vehicle extension is recommended provided the detector is at least 60 ft in length. A length of 80 ft is preferred. For minimum green, the conventional design practice gives the best delay outputs.

This paper appears in Transportation Research Record No. 1244, Traffic and Grade Crossing Control Devices. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01414219

p. 32-38

1989

Transportation Research Record

0309049709

Figures (8) ; References (5)

Design; Location; Optimization; Traffic actuated controllers; Traffic delays; Traffic volume; Vehicle detectors

Design; Highways; Operations and Traffic Management; I73: Traffic Control

TRIS, TRB, ATRI

Jul 31 1990 12:00AM

• AGE DIFFERENCES IN A VISUAL INFORMATION PROCESSING CAPABILITY UNDERLYING TRAFFIC CONTROL DEVICE USAGE
• ALL-WAY STOPS: A NEW POLICY (WITH DISCUSSION AND CLOSURE)
• ARIZONA'S EXPERIENCE WITH THE 65-MPH SPEED LIMIT
• EVALUATION OF TWO ACTIVE TRAFFIC CONTROL DEVICES FOR USE AT RAILROAD-HIGHWAY GRADE CROSSINGS
• EVALUATION OF UNMANNED RADAR INSTALLATIONS
• FIELD EVALUATION OF A FOUR-QUADRANT GATE SYSTEM FOR USE AT RAILROAD-HIGHWAY GRADE CROSSINGS
• PROPOSED PROCEDURE FOR SELECTING TRAFFIC SIGNAL CONTROL AT SCHOOL CROSSINGS