CMF / CRF Details

CMF ID: 52

Install wire guardrails between lanes of opposing traffic


Prior Condition:  No Prior Condition(s)

Category: Roadside

Study: Handbook of Road Safety Measures, Elvik, R. and Vaa, T., 2004

Star Quality Rating:1 Star  [View score details]
Rating Points Total:30
Crash Modification Factor (CMF)
Adjusted Standard Error:2.54
Unadjusted Standard Error:0.51
Crash Reduction Factor (CRF)
Value:100  (This value indicates a decrease in crashes)
Adjusted Standard Error:254
Unadjusted Standard Error:51
Crash Type:All
Crash Severity:K (fatal)
Roadway Types:Principal Arterial Other
Street Type:
Minimum Number of Lanes:3
Maximum Number of Lanes:3
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Not specified
Traffic Volume:
Average Traffic Volume:
Time of Day:
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:
Type of Methodology Used:Other before/after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 01, 2009