CMF / CRF Details

CMF ID: 1411

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Description:

Prior Condition:  No Prior Condition(s)

Category: Intersection traffic control

Study: Older Drivers at a Crossroads, Morena et al., 2007

 
Star Quality Rating:2 Stars  [View score details]
Rating Points Total:35
Crash Modification Factor (CMF)
Value:0.69
Adjusted Standard Error:
Unadjusted Standard Error:0.066
Crash Reduction Factor (CRF)
Value:31  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:6.6
Applicability
Crash Type:All
Crash Severity:All
Roadway Types:Not specified
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:Urban
Traffic Volume:
Average Traffic Volume:
Time of Day:All
If countermeasure is intersection-based
Intersection Type:Roadway/roadway (not interchange related)
Intersection Geometry:4-leg
Traffic Control:Signalized
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:
Municipality:Detroit
State:MI
Country:usa
Type of Methodology Used:Simple before/after
Sample Size (crashes):272 crashes before, 189 crashes after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 01, 2009
Comments:Applies to older driver crashes (ages 65+)