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Title: TRAVEL EFFICIENCY OF UNCONVENTIONAL SUBURBAN ARTERIAL INTERSECTION DESIGNS
Accession Number: 00715003
Record Type: Component
Availability: Find a library where document is available Abstract: A great need exists for lower-cost design strategies to reduce congestion on major suburban arterials on which conventional techniques have been exhausted. This study examines the possible gains in travel efficiency from three unconventional strategies: the median U-turn, in which left turns are made using crossovers on the arterial approximately 180 m from the main intersection; continuous green T-intersection (CGT), in which one or two lanes at the top of the "T" receive a constant green indication; and the North Carolina State University (NCSU) Bowtie, developed during the project, in which left-turning traffic uses roundabouts on the side street approximately 180 m from the main intersection. The study used Traf-Netsim 4.0 to simulate the unconventional configurations and a conventional intersection for comparison in three factorial experiments. The experiments showed that the unconventional alternatives have the potential to provide for more efficient travel. The CGT configurations reduced travel time and stops substantially at three-legged intersections for through volumes of more than 400 vehicles per hour per lane. The median U-turn became more efficient than the CGTs at higher through volumes. An experiment with a four-legged intersection showed that the NCSU Bowtie reduced travel time and stops from the conventional configuration at about 900 or more critical through vehicles per hour. Questions remain about the unconventional strategies, but that they potentially provide for more efficient travel is clear.
Supplemental Notes: This paper appears in Transportation Research Record No. 1500, Geometric Design, Roadside Safety Features, Roadside Hardware Monitoring, and Scenic Loop Tours. 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: Geometric design, roadside safety features, roadside hardware monitoring, and scenic loop tours Monograph Accession #: 01399820
Language: English
Authors: Hummer, Joseph EBoone, Jonathan LPagination: p. 153-161
Publication Date: 1995
Serial: Features: Figures
(4)
; References
(12)
; Tables
(4)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Design; Highways; Public Transportation; I20: Design and Planning of Transport Infrastructure
Files: TRIS, TRB
Created Date: Dec 26 1995 12:00AM
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