CMF / CRF Details

CMF ID: 10186

Change shoulder width from X to Y (meters)

Description: Change shoulder width from X to Y (meters)

Prior Condition:  Total shoulder width of X meters, where X is greater than or equal to 2.25 meters

Category: Shoulder treatments

Study: The influence of shoulder characteristics on the safety level of two-lane roads: A case-study, Gitelman et al., 2019

 
Star Quality Rating:2 Stars  [View score details]
Rating Points Total:70
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)
Roadway Types:Not specified
Street Type:
Minimum Number of Lanes:2
Maximum Number of Lanes:2
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:Undivided
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Rural
Traffic Volume:
Average Traffic Volume:
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:2008 to 2010
Municipality:
State:notusa
Country:Israel
Type of Methodology Used:Case-control
Sample Size (sites):2010 sites
Sample Size (site-years):6030 site-years
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 07, 2019
Comments:This CMFunction applies when both existing (X) and proposed (Y) total shoulder width are greater than or equal to 2.25 meters.