CMF / CRF Details

CMF ID: 5236

Install cable median barrier (high tension)


Prior Condition:  No Cable Median Barrier

Category: Roadside

Study: In-Service Performance Evaluation (ISPE) for G4 (1S) Type of Strong-Post W-Beam Guardrail System and Cable Median Barrier: Volume II, Alluri, P., K. Hallem, and A. Gan., 2012

Star Quality Rating:1 Star  [View score details]
Rating Points Total:30
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.215
Crash Reduction Factor (CRF)
Value:20.1  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:21.5
Crash Type:Other
Crash Severity:A (serious injury)
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:
Traffic Volume:Minimum of 37429 to Maximum of 74191 Annual Average Daily Traffic (AADT)
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:2003 to 2010
Type of Methodology Used:Simple before/after
Sample Size (crashes):31 crashes before, 30 crashes after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 02, 2013
Comments:Median Related Crashes