COMPUTER SIMULATION STUDY OF THE OPERATIONAL EFFECTS OF TWO-WAY LEFT-TURN LANES ON URBAN FOUR-LANE ROADWAYS
The two-way left-turn lane (TWLTL) is commonly used to solve safety and operational problems on four-lane undivided roadways that result from conflicts between through-traffic and drivers making mid-block left turns. Numerous studies of the safety effects of TWLTL medians have been conducted, but studies of their operational effects have been limited. Consequently, attempts to develop guidelines for the use of the TWLTL have focused on safety benefits and have not adequately accounted for the operational savings it provides. In this study, computer simulation was used to determine the operational effects of TWLTL medians on urban four-lane roadways. Multiple regression analyses of the results of the simulation runs were conducted to determine the relationships between the operational effects of TWLTL medians and prevailing roadway and traffic conditions. Regression equations were developed for predicting the reduction in stops and delay provided by TWLTL medians. This paper includes a description of the simulation model as well as the procedures, findings, and conclusions of the study.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309047609
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1195, Geometric Design and Operational Effects. 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
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Authors:
- Ballard, J L
- McCoy, P T
- Publication Date: 1988
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 1-10
- Monograph Title: Geometric design and operational effects
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Serial:
- Transportation Research Record
- Issue Number: 1195
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Equations; Forecasting; Four lane highways; Multiple regression analysis; Operations; Reduction (Chemistry); Regression analysis; Simulation; Stopping; Traffic delays; Two way left turn lanes; Urban areas
- Old TRIS Terms: Multiple regression; Operational effects; Reduction; Two way left turn
- Subject Areas: Administration and Management; Data and Information Technology; Highways; Operations and Traffic Management; I73: Traffic Control;
Filing Info
- Accession Number: 00489685
- Record Type: Publication
- ISBN: 0309047609
- Files: TRIS, TRB, ATRI
- Created Date: Nov 30 1989 12:00AM