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]
Rating Points Total:100
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
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:
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: