CMF / CRF Details

CMF ID: 5442

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)
Value:1.91
Adjusted Standard Error:
Unadjusted Standard Error:0.0622
Crash Reduction Factor (CRF)
Value:-91  (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:6.22
Applicability
Crash Type:All
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
Municipality:
State:WA
Country:USA
Type of Methodology Used:Simple before/after
Sample Size (crashes):1372 crashes before, 2962 crashes after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Apr 30, 2014
Comments:CMF for all median related crashes; Cable median barrier includes generic cable median, 3-strand high-tension cable, and 4-strand high-tension cable