CMF / CRF Details

CMF ID: 41

Change barrier along embankment to less rigid type

Description:

Prior Condition: No Prior Condition(s)

Category: Roadside

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

 
Star Quality Rating: 3 Stars   [View score details]
Rating Points Total: 105
Crash Modification Factor (CMF)
Value: 0.68
Adjusted Standard Error: 0.1
Unadjusted Standard Error: 0.06
Crash Reduction Factor (CRF)
Value: 32   (This value indicates a decrease in crashes)
Adjusted Standard Error: 10
Unadjusted Standard Error: 6
Applicability
Crash Type: Run off road
Crash Severity: A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
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:
Municipality:
State:
Country:
Type of Methodology Used: 9
Other Details
Included in Highway Safety Manual? Yes. HSM lists this CMF in bold font to indicate that it has the highest reliability since it has an adjusted standard error of 0.1 or less.
Date Added to Clearinghouse: Dec-01-2009
Comments: