CMF / CRF Details

CMF ID: 5415

Crash modification factor for 12 ft travel lane, with a total shoulder of X ft

Description: The base condition is a 12 ft travel lane, with a total shoulder width of X ft, including paved and unpaved shoulder width

Prior Condition:  12 ft lane width and 6 ft shoulder width

Category: Roadway

Study: Safety Effects of Cross Section Design on Urban and Suburban Roads, Le and Porter, 2012

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:85
Crash Modification Factor (CMF)
Value:Equation
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:Equation
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:All
Crash Severity:K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types:Not specified
Street Type:
Minimum Number of Lanes:
Maximum Number of Lanes:
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:All
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Urban and suburban
Traffic Volume:Minimum of 1183 to Maximum of 47067 Annual Average Daily Traffic (AADT)
Average Traffic Volume:11317 Annual Average Daily Traffic (AADT)
Time of Day:All
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
Traffic Control:
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:2007 to 2009
Municipality:
State:IL
Country:USA
Type of Methodology Used:Regression cross-section
Sample Size (crashes):2004 crashes
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jan 09, 2014
Comments:The function includes an interaction between lane width and shoulder width