Study Details

Safety Effectiveness of Intersection Left- and Right-Turn Lanes

Study ID: 24

Authors: Harwood et al.

Publication Date:  2002

Abstract:

Study Citation: Harwood, D. W., Bauer, K. M., Potts, I. B., Torbic, D. J., Richard, K. R., Rabbani, E. R., Hauer, E., Elefteriadou, L., and Griffith, M. S., "Safety Effectiveness of Intersection Left- and Right-Turn Lanes." Washington, D.C., 82nd Transportation Research Board Annual Meeting, (2003)

Related Citations: D.W . Harwood, K.M . Bauer, I.B. Potts, D .J. Torbic, K.R. Richard, E.R. Kohlman Rabbani, E. Hauer, and L. Elefteriadou. Safety Effectiveness of Intersection Left- and Right-Turn Lanes. 2002. Final Report FHW A-RD-02-089. Federal Highway Administration

Study Type: Conference Paper

Study Report: Download the Study Report Document


CMFs Associated With This Study

Category: Intersection geometry

Countermeasure: Installation of left-turn lanes on both major road approaches

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.67[#chr(176)#]33Cannot Be Rated (HSM)AllAllMinor Arterial

Countermeasure: Provide a left-turn lane on both major-road approaches

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.52[B]484 StarsAllAllNot SpecifiedRural
0.53[B]474 StarsAllAllNot SpecifiedUrban
0.81[B]194 StarsAllAllNot SpecifiedUrban
0.58[B]424 StarsAllAllNot SpecifiedUrban
0.42[B]584 StarsAllK,A,B,CNot SpecifiedRural
0.5[B]504 StarsAllK,A,B,CNot SpecifiedUrban
0.83[B]174 StarsAllK,A,B,CNot SpecifiedUrban
0.52[B]484 StarsAllK,A,B,CNot SpecifiedUrban

Countermeasure: Provide a left-turn lane on one major-road approach

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.56[B]444 StarsAllAllNot SpecifiedRural
0.67[I]334 StarsAllAllNot SpecifiedUrban
0.45[B]554 StarsAllK,A,B,CNot SpecifiedRural
0.72[B]284 StarsAllAllNot SpecifiedRural
0.73[B]274 StarsAllAllNot SpecifiedUrban
0.9[B]104 StarsAllAllNot SpecifiedUrban
0.76[B]244 StarsAllAllNot SpecifiedUrban
0.65[B]354 StarsAllK,A,B,CNot SpecifiedRural
0.71[B]294 StarsAllK,A,B,CNot SpecifiedUrban
0.91[B]94 StarsAllK,A,B,CNot SpecifiedUrban
0.72[B]284 StarsAllK,A,B,CNot SpecifiedUrban
0.85[#chr(176)#]15Cannot Be Rated (HSM)AllAllMinor ArterialRural
0.93[#chr(176)#]7Cannot Be Rated (HSM)AllAllMinor ArterialUrban
0.82[#chr(176)#]18Cannot Be Rated (HSM)AllAllMinor ArterialRural

Countermeasure: Provide a right-turn lane on both major-road approaches

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.74[B]264 StarsAllAllNot SpecifiedAll
0.92[B]84 StarsAllAllNot SpecifiedAll
0.59[#chr(176)#]41Cannot Be Rated (HSM)AllK,A,B,CMinor ArterialAll
0.83[#chr(176)#]17Cannot Be Rated (HSM)AllK,A,B,CMinor ArterialAll

Countermeasure: Provide a right-turn lane on one major-road approach

CMF CRF(%)QualityCrash TypeCrash SeverityRoadway TypeArea Type
0.86[B]144 StarsAllAllNot SpecifiedAll
0.96[B]44 StarsAllAllNot SpecifiedAll
0.77[B]234 StarsAllK,A,B,CNot SpecifiedAll
0.91[B]94 StarsAllK,A,B,CNot SpecifiedAll