Study Details

Study Title: Safety Effects of Using Narrow Lanes and Shoulder-Use Lanes to Increase the Capacity of Urban Freeways

Authors: Bauer et al.

Publication Date: 2004

Abstract:

Study Citation: Bauer, K. M., Harwood, D. W., Hughes, W. E., and Richard, K. R., "Safety Effects of Using Narrow Lanes and Shoulder-Use Lanes to Increase the Capacity of Urban Freeways." Washington, D.C., 83rd Transportation Research Board Annual Meeting, (2004)


CMFs Associated With This Study

Category: Roadway

Countermeasure: Five to six lane conversion

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
1.03 [B*] -3 3 Stars All All Principal Arterial Other Freeways and Expressways Urban
1.04 [B*] -4 3 Stars All A,B,C,O Principal Arterial Other Freeways and Expressways Urban
1.07 [B*] -7 3 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Urban

Countermeasure: Four to five lane conversion

CMF CRF(%) Quality Crash Type Crash Severity Roadway Type Area Type
1.11 [B] -11 4 Stars All All Principal Arterial Other Freeways and Expressways Urban
1.1 [B*] -10 3 Stars All A,B,C,O Principal Arterial Other Freeways and Expressways Urban
1.11 [B] -11 3 Stars All K,A,B,C Principal Arterial Other Freeways and Expressways Urban