CMF / CRF Details

CMF ID: 6397

Convert unsignalized intersection to roundabout

Description:

Prior Condition: No Prior Condition(s)

Category: Intersection geometry

Study: Safety effects of an extensive black spot treatment programme in Flanders-Belgium, De Pauw et al., 2014

 
Star Quality Rating: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.87
Adjusted Standard Error:
Unadjusted Standard Error: 0.28
Crash Reduction Factor (CRF)
Value: 13   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 28
Applicability
Crash Type: All
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: All
Traffic Volume:
Average Traffic Volume:
Time of Day: All
If countermeasure is intersection-based
Intersection Type: Roadway/roadway (not interchange related)
Intersection Geometry: Not specified
Traffic Control: Uncontrolled
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 2000 to 2008
Municipality:
State:
Country: Belgium
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-11-2015
Comments: Comparison group 1 (black spots treated after 2008)