CMF / CRF Details

CMF ID: 2521

Left side off ramp

Description: Safety performance of left-side off ramps

Prior Condition:  Base condition: Right side off ramp

Category: Interchange design

Study: Operational and Safety Performance of Left-Side Off-Ramps at Freeway Diverge Areas, Zhou et al., 2010

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:95
Crash Modification Factor (CMF)
Value:1.49
Adjusted Standard Error:
Unadjusted Standard Error:0.2628
Crash Reduction Factor (CRF)
Value:-49  (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:26.28
Applicability
Crash Type:Not specified
Crash Severity:Not specified
Roadway Types:Principal Arterial Interstate
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:Not specified
Traffic Volume:
Average Traffic Volume:
Time of Day:Not specified
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:2004 to 2006
Municipality:
State:FL
Country:
Type of Methodology Used:Regression cross-section
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Aug 11, 2010
Comments: