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)
Value: 0.799
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
State: FL
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