CMF / CRF Details

CMF ID: 3052

Divided vs. undivided cross road at diamond interchange ramps

Description:

Prior Condition: Undivided

Category: Interchange design

Study: Developing Safety Performance Functions for Diamond Interchange Ramp Terminals, Wang et al., 2011

 
Star Quality Rating: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.53
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value: 47.2   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type: All
Crash Severity: All
Roadway Types: Principal Arterial Other Freeways and Expressways
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type:
Traffic Volume:
Average Traffic Volume:
Time of Day: All
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (interchange ramp terminal)
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: 2004 to 2008
Municipality:
State: WI
Country: USA
Type of Methodology Used: Regression cross-section
Sample Size (crashes): 1259 crashes
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jul-15-2011
Comments: