Study Details
Study Title: Safety Effectiveness of Intersection Left- and Right-Turn Lanes
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)
CMFs Associated With This Study
Category: Intersection geometry
Countermeasure: Installation of left-turn lanes on both major road approaches
CMF | CRF(%) | Quality | Crash Type | Crash Severity | Roadway Type | Area Type |
---|---|---|---|---|---|---|
0.67[#chr(176)#] | 33 | text text | All | All | Minor Arterial |
Countermeasure: Provide a left-turn lane on both major-road approaches
CMF | CRF(%) | Quality | Crash Type | Crash Severity | Roadway Type | Area Type |
---|---|---|---|---|---|---|
0.52[B] | 48 | All | All | Not Specified | Rural |
0.53[B] | 47 | All | All | Not Specified | Urban |
0.81[B] | 19 | All | All | Not Specified | Urban |
0.58[B] | 42 | All | All | Not Specified | Urban |
0.42[B] | 58 | All | K,A,B,C | Not Specified | Rural |
0.5[B] | 50 | All | K,A,B,C | Not Specified | Urban |
0.83[B] | 17 | All | K,A,B,C | Not Specified | Urban |
0.52[B] | 48 | All | K,A,B,C | Not Specified | Urban |
Countermeasure: Provide a left-turn lane on one major-road approach
CMF | CRF(%) | Quality | Crash Type | Crash Severity | Roadway Type | Area Type |
---|---|---|---|---|---|---|
0.56[B] | 44 | All | All | Not Specified | Rural |
0.67[I] | 33 | All | All | Not Specified | Urban |
0.45[B] | 55 | All | K,A,B,C | Not Specified | Rural |
0.72[B] | 28 | All | All | Not Specified | Rural |
0.73[B] | 27 | All | All | Not Specified | Urban |
0.9[B] | 10 | All | All | Not Specified | Urban |
0.76[B] | 24 | All | All | Not Specified | Urban |
0.65[B] | 35 | All | K,A,B,C | Not Specified | Rural |
0.71[B] | 29 | All | K,A,B,C | Not Specified | Urban |
0.91[B] | 9 | All | K,A,B,C | Not Specified | Urban |
0.72[B] | 28 | All | K,A,B,C | Not Specified | Urban |
0.85[#chr(176)#] | 15 | text text | All | All | Minor Arterial | Rural |
0.93[#chr(176)#] | 7 | text text | All | All | Minor Arterial | Urban |
0.82[#chr(176)#] | 18 | text text | All | All | Minor Arterial | Rural |
Countermeasure: Provide a right-turn lane on both major-road approaches
CMF | CRF(%) | Quality | Crash Type | Crash Severity | Roadway Type | Area Type |
---|---|---|---|---|---|---|
0.74[B] | 26 | All | All | Not Specified | All |
0.92[B] | 8 | All | All | Not Specified | All |
0.59[#chr(176)#] | 41 | text text | All | K,A,B,C | Minor Arterial | All |
0.83[#chr(176)#] | 17 | text text | All | K,A,B,C | Minor Arterial | All |
Countermeasure: Provide a right-turn lane on one major-road approach
CMF | CRF(%) | Quality | Crash Type | Crash Severity | Roadway Type | Area Type |
---|---|---|---|---|---|---|
0.86[B] | 14 | All | All | Not Specified | All |
0.96[B] | 4 | All | All | Not Specified | All |
0.77[B] | 23 | All | K,A,B,C | Not Specified | All |
0.91[B] | 9 | All | K,A,B,C | Not Specified | All |