00162981

Component

http://onlinepubs.trb.org...s/trr/1976/615/615-007.pdf

http://scholar.google.com...erry&publication_year=1976

The relation of sampling of queue backup and delay at signalized intersections was studied and evaluated for use as a level-of-service indicator for intersection performance. Time-lapse photography was used at four urban intersections controlled by pretimed signals to determine time-in-queue delay. At the same time, each field observer sampled the position of the rear of the queue in one lane at 10-s intervals. Other field methods of measuring delay were tested also. Regression analysis of resulting delay values by cycle yielded high correlations between queue backup delay from field sampling and time-in-queue delay from film analysis. Field sampling of queue backup was found to be much simpler to use in the field than field sampling of stopped time delay. Field sampling was confined primarily to three unsaturated approaches that had few left-turning vehicles. Further study is needed to validate and refine field procedures under a wider range of conditions. /Author/

Publication of this paper sponsored by Committee on Highway Capacity and Quality of Service. 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.

01418795

pp 30-36

1976

Transportation Research Record

55th Annual Meeting of the Transportation Research Board

0309025915

Digital/other

Figures (2) ; References (11) ; Tables (6)

Intersections; Level of service; Measurement; Queuing; Regression analysis; Sampling; Signalized intersections; Time lapse photography; Traffic congestion; Traffic delays; Urban highways

Data and Information Technology; Highways; Operations and Traffic Management

TRIS, TRB

Oct 13 1977 12:00AM

• BERGER-ROBERTSON METHOD FOR MEASURING INTERSECTION DELAY (ABRIDGEMENT)
• BUS PRIORITY SYSTEM STUDIES USING INSTRUMENTED BUSES (ABRIDGEMENT)
• CAPACITY EVALUATION OF TWO-LANE, TWO-WAY HIGHWAYS BY SIMULATION MODELING
• COMPARISON OF METHODS TO DETERMINE INTERSECTION SERVICE LEVEL (ABRIDGEMENT)
• MEASURES OF PEDESTRIAN BEHAVIOR AT INTERSECTIONS
• NONLINEAR TRUCK FACTOR FOR TWO-LANE HIGHWAYS
• PASSENGER CAR EQUIVALENCIES OF TRUCKS, BUSES, AND RECREATIONAL VEHICLES FOR TWO-LANE RURAL HIGHWAYS
• RELATIONSHIP OF SIGNAL DESIGN TO DISCHARGE HEADWAY, APPROACH CAPACITY, AND DELAY
• SPEEDS AND SERVICE ON MULTILANE UPGRADES
• STUDY OF LOCATION BIAS IN SPEED-VOLUME RELATIONSHIPS FOR TWO-LANE ARTERIAL ROADWAYS (ABRIDGEMENT)
• TESTING OF THE TAPESWITCH SYSTEM FOR DETERMINING VEHICLE SPEED AND LATERAL PLACEMENT (ABRIDGEMENT)
• WEIGHING IN MOTION IN CALIFORNIA (ABRIDGEMENT)