00621695

Component

http://onlinepubs.trb.org...trr/1991/1320/1320-020.pdf

https://scholar.google.co...isty&publication_year=1991

Three objectives are sought: (a) to present a data base for two-way-stop-controlled (TWSC) intersections that can be used to investigate the factors that influence delay and capacity, (b) to identify some of the factors that affect delay and capacity at a TWSC intersection, and (c) to develop a set of preliminary models to estimate delay and capacity. Traffic flow, delay, and geometric data were collected at nine TWSC intersection sites in the Pacific Northwest encompassing a total of 13 hr of intersection operation. A total of 970 minor-street (subject approach) vehicles were observed and nearly 2,000 accepted and rejected gaps were identified and recorded. Each site has several common characteristics: four approach legs, single lanes on aeach approach, and a 25-mph speed limit on the major street. Several factors were identified that may influence delay and capacity at a TWSC intersection. The time waiting in queue (queue time) is affected by the traffic flow rate on the subject and opposing approaches, whereas the time spent waiting at the stop line (service time) is affected by the traffic flow rate on the conflicting approaches. The capacity of the subject approach is also affected by the flow rate on the conflicting approaches. The size of the accepted gap is affected by the length of time that a vehicle has been delayed, the flow rate on the conflicting approaches, and the directional movement of the subject vehicle.

This paper appears in Transportation Research Record No. 1320, Freeway Operations, Highway Capacity, and Traffic Flow 1991. 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

01407170

p. 160-167

1991

Transportation Research Record

0309051533

Figures (6) ; References (11) ; Tables (8)

Flow; Four leg intersections; Gap acceptance; Geometric elements; Highway capacity; Stop signs; Streets; Traffic delays; Traffic flow; Unsignalized intersections

Flow rate; Two-way stop control

Highways; Operations and Traffic Management; I71: Traffic Theory

TRIS, TRB, ATRI

Apr 30 1992 12:00AM

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