CMF / CRF Details

CMF ID: 243

Convert to roundabout

Description:

Prior Condition: No Prior Condition(s)

Category: Intersection geometry

Study: The Effects of Roundabouts on Traffic Safety for Bicyclists: An Observational Study, Daniels et al., 2008

 
Star Quality Rating: 2 Stars
Crash Modification Factor (CMF)
Value: 1.48
Adjusted Standard Error: 0.52
Unadjusted Standard Error: 0.23
Crash Reduction Factor (CRF)
Value: -48   (This value indicates an increase in crashes)
Adjusted Standard Error: 52
Unadjusted Standard Error: 23
Applicability
Crash Type: Vehicle/bicycle
Crash Severity: A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type: Urban
Traffic Volume:
Average Traffic Volume:
Time of Day:
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry: Not specified
Traffic Control: Not specified
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:
Municipality:
State:
Country:
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-01-2009
Comments: