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Title: Safety Evaluation of Installing Center Two-Way Left-Turn Lanes on Two-Lane Roads
Accession Number: 01100656
Record Type: Component
Record URL: Availability: Transportation Research Board Business Office 500 Fifth Street, NW Find a library where document is available Abstract: FHWA organized a pooled fund study of 26 states to evaluate low-cost safety strategies as part of its strategic highway safety effort. One of the strategies chosen to be evaluated for this study was the installation of center two-way left-turn lanes (TWLTLs) on two-lane roads. Geometric, traffic, and crash data were obtained for 78 sites (21.3 mi) in North Carolina, 10 sites (6.0 mi) in Illinois, 31 sites (6.8 mi) in California, and 25 sites (13.2 mi) in Arkansas. Empirical Bayes methods were incorporated in a before–after analysis to determine the safety effectiveness of installing the TWLTLs. There was a statistically significant reduction in total and rear-end crashes in each of four states whose installations were evaluated. Rural installations were found to be more effective in reducing crashes than were urban installations in each of the four states. The general conclusion of this research is that TWLTLs can be a cost-effective treatment for two-lane rural locations, especially those with a high frequency of rear-end collisions involving a lead vehicle desiring to make a left turn.
Monograph Title: Operational Effects of Geometrics and Access Management 2008 Monograph Accession #: 01116578
Language: English
Authors: Lyon, CraigPersaud, Bhagwant NLefler, Nancy XCarter, Daniel LEccles, Kimberly APagination: pp 34-41
Publication Date: 2008
ISBN: 9780309113496
Media Type: Print
Features: References
(13)
; Tables
(8)
TRT Terms: Uncontrolled Terms: Geographic Terms: Subject Areas: Highways; Operations and Traffic Management; Safety and Human Factors; I73: Traffic Control; I82: Accidents and Transport Infrastructure
Files: TRIS, TRB, ATRI
Created Date: Jan 29 2008 4:29PM
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