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]
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
Number of Lanes:
Road Division Type:
Speed Limit:
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+)