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Title: SIMULATING TRAFFIC CONTROL DEVICES IN A SUB-AREA NETWORK
Accession Number: 00607710
Record Type: Component
Availability: Find a library where document is available Abstract: In a sub-area network, stop signs and signals at intersections can be a significant influence on travel paths. The presence of such devices often must be simulated in computerized highway networks so as to obtain more realistic assignments. One common way of doing this is to use "turn penalties." This is very resource-intensive, and has been known to confuse the path-building logic of some programs, resulting in poor assignments. An alternative method has been developed to avoid these problems. This method is based on theoretical models of delay, as a function of the V/C ratio of the controlled approach. Given the link's distance, the uncontrolled free speed, and the type of control device, a new "zero-volume" link speed and capacity are calculated to account for the delay induced by the control device. Further, the characteristics of the link are modified to account for delay caused by queuing: as traffic is assigned to the link, its constrained speed drops at a faster rate than if it had no control device. A county-wide travel demand model using this technique was implemented using MINUTP, and the control device simulation method was applied with a FORTRAN program which modifies the speed and capacity of controlled links. A comparison of assigned volumes to ground counts by control device type showed reasonable results, and the constrained speeds on controlled links were also found acceptable.
Supplemental Notes: This paper appears in Transportation Research Record No. 1283, Transportation Systems Planning and Applications 1990. 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
Monograph Title: Monograph Accession #: 01411087
Authors: Allen Jr, William GPagination: p. 63-69
Publication Date: 1990
Serial: ISBN: 0309050693
Features: Figures
(4)
; References
(3)
; Tables
(1)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Highways; Operations and Traffic Management; I73: Traffic Control
Files: TRIS, TRB, ATRI
Created Date: Apr 30 1991 12:00AM
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