CMF / CRF Details

CMF ID: 2219

Install raised median


Prior Condition: No Prior Condition(s)

Category: Access management

Study: Correlating Access Management to Crash Rate, Severity, and Collision Type, Schultz et al., 2008

Star Quality Rating: 4 Stars   [View score details]
Rating Points Total: 125
Crash Modification Factor (CMF)
Value: 0.29
Adjusted Standard Error:
Unadjusted Standard Error: 0.184
Crash Reduction Factor (CRF)
Value: 70.77   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 18.37
Crash Type: All
Crash Severity: All
Roadway Types: Principal Arterial Other
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:
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type: Urban
Traffic Volume: Minimum of 1390 to Maximum of 51200 Average Daily Traffic (ADT)
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: 2002 to 2004
State: UT
Type of Methodology Used: Regression cross-section
Sample Size (site-years): 525 site-years
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-01-2009