CMF / CRF Details

CMF ID: 2220

Install raised median

Description:

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: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.45
Adjusted Standard Error:
Unadjusted Standard Error: 0.125
Crash Reduction Factor (CRF)
Value: 55.43   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 12.51
Applicability
Crash Type: Angle
Crash Severity: All
Roadway Types: Principal Arterial Other
Number of Lanes:
Road Division Type:
Speed Limit:
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
Municipality:
State: UT
Country:
Type of Methodology Used: Regression cross-section
Sample Size (sites): 525 sites
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-01-2009
Comments: