CMF / CRF Details

CMF ID: 20

Provide a raised median

Description:

Prior Condition: No Prior Condition(s)

Category: Access management

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

 
Star Quality Rating: 2 Stars
Crash Modification Factor (CMF)
Value: 2.28
Adjusted Standard Error: 0.55
Unadjusted Standard Error: 0.31
Crash Reduction Factor (CRF)
Value: -128   (This value indicates an increase in crashes)
Adjusted Standard Error: 55
Unadjusted Standard Error: 31
Applicability
Crash Type: All
Crash Severity: O (property damage only)
Roadway Types: Not specified
Number of Lanes: 2
Road Division Type:
Speed Limit:
Area Type: Rural
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: Meta-analysis
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-01-2009
Comments: Countermeasure name has been slightly modified for consistency across Clearinghouse