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                Safety Evaluation of Center Two-Way Left-Turn Lanes on Two-Lane Roads
FHWA-HRT-08-046.pdf (1.12 MB)
      
  Publication Information
                  Publication Type:TechBrief
                  Publication Number:FHWA-HRT-08-046
              Abstract:This document is a technical summary of the Federal Highway Administration report, "Safety Evaluation of Center Two-Way Left-Turn Lanes on Two-Lane Roads." The objective of this study was to evaluate the safety effectiveness of installing Two-Way Left-Turn Lanes (TWLTLs) on rural roads as measured by crash frequency before and after the installation of the TWLTLs. The study also examined the effects of this strategy on specific crash types; total, injury, and rear-end crashes were examined in a rigorous analysis, while a cursory analysis was performed for head-on, intersection, and nonintersection crashes. The results of the analysis indicate statistically significant reductions at the 95% confidence level in total, injury, and rear-end crashes for the combined results of the four states examined. Further results are discussed in this TechBrief.
              Publishing Date:March 2008
                          NTIS:PB2008-110827
                          Publishing Office:Office of Safety Research and Development
                  FHWA Program(s):Safety
              Research
              AMRP Program(s):Safety Data and Analysis
              FHWA Activities:Highway Safety Information System
              Subject Area:Safety and Human Factors U.S. DEPARTMENT OF TRANSPORTATION

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