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Title: EXAMINATION OF INDICATORS OF CONGESTION LEVEL
Accession Number: 00625695
Record Type: Component
Availability: Find a library where document is available Abstract: This research report examines the relationships between many possible indicators of congestion and estimated congestion level in an attempt to identify and validate indicators for areawide congestion measurement purposes. The study estimates the congestion level for 50 large and medium-sized U.S. urban areas with 3 congestion measures. The estimated congestion level for each urban area is then graphically and statistically compared to indicators composed of travel, facility supply, and demographic characteristics to determine close relationships. Two of the congestion measures used in this study, the roadway congestion index and the congestion severity index, produced results with a high correlation to each other. An index-incorporating congestion duration on freeway segments (lane-mile duration index) suffered from unobtainable data for several urban areas and was consequently less comparable between the other two measures. It was determined that two indicators related to travel intensity--daily vehicle miles of travel per lane-mile and daily vehicle miles of travel per square mile--had the closest correlation to estimated congestion levels. Average annual daily freeway traffic per hourly capacity, previously used as a facility measure, was identified also as having a close relationship to areawide congestion level.
Supplemental Notes: This paper appears in Transportation Research Record No. 1360, Traffic Operations. 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 #: 01405038
Language: English
Authors: Turner, Shawn MPagination: p. 150-157
Publication Date: 1992
Serial: ISBN: 0309052238
Features: Figures
(6)
; References
(16)
; Tables
(2)
TRT Terms: Uncontrolled Terms: Geographic Terms: Old TRIS Terms: Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; I71: Traffic Theory
Files: TRIS, TRB, ATRI
Created Date: Jan 6 1993 12:00AM
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0000-0002-5717-7742