CMF / CRF Details

CMF ID: 5445

Install cable median barrier

Description: Install cable median barrier

Prior Condition:  No Cable Median Barrier

Category: Roadside

Study: Cable Median Barrier Program in Washington State, Olson et al. 2013, 2013

Star Quality Rating:2 Stars  [View score details]
Rating Points Total:60
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.037
Crash Reduction Factor (CRF)
Value:65  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:3.7
Crash Type:Cross median
Crash Severity:All
Roadway Types:Principal Arterial Other Freeways and Expressways
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:Divided by Median
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Not specified
Traffic Volume:Minimum of 10000 to Maximum of 180000 Annual Average Daily Traffic (AADT)
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:1995 to 2011
Type of Methodology Used:Simple before/after
Sample Size (crashes):305 crashes before, 132 crashes after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Apr 30, 2014
Comments:CMF for all cross-median related crashes; Cable median barrier includes generic cable median, 3-strand high-tension cable, and 4-strand high-tension cable