CMF / CRF Details

CMF ID: 3061

Change spacing distance between two ramp terminals at diamond interchange from X to Y feet

Description:

Prior Condition:  No Prior Condition(s)

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:75
Crash Modification Factor (CMF)
Value:Equation
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:Equation
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:Rear end
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:35
Maximum Speed Limit:45
Speed Unit:mph
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:Signalized
Major Road Traffic Volume:Minimum of 4200 to Maximum of 50850 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:Minimum of 2000 to Maximum of 24800 Annual Average Daily Traffic (AADT)
Average Major Road Volume :
Average Minor Road Volume :24800 Annual Average Daily Traffic (AADT)
Development Details
Date Range of Data Used:2004 to 2008
Municipality:Madison
State:WI
Country:USA
Type of Methodology Used:Regression cross-section
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jul 15, 2011
Comments: