CMF / CRF Details

CMF ID: 7868

Conversion of stop-controlled intersection to roundabout

Description: Conversion of stop-controlled intersection to roundabout

Prior Condition: Intersections with stop-controlled minor roads

Category: Intersection geometry

Study: Validation and Application of Highway Safety Manual (Part D) in Florida, Abdel-Aty et al., 2014

 
Star Quality Rating: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.29
Adjusted Standard Error:
Unadjusted Standard Error: 0.1
Crash Reduction Factor (CRF)
Value: 71   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 10
Applicability
Crash Type: All
Crash Severity: K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types: Not specified
Number of Lanes:
Road Division Type:
Speed Limit:
Area Type: Not specified
Traffic Volume:
Average Traffic Volume:
Time of Day: All
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry: No values chosen.
Traffic Control:
Major Road Traffic Volume: Minimum of 258 to Maximum of 60000 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume: Minimum of 258 to Maximum of 60000 Annual Average Daily Traffic (AADT)
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 2008 to 2012
Municipality:
State: FL
Country: USA
Type of Methodology Used: Regression cross-section
Sample Size (crashes): 755 crashes
Sample Size (sites): 253 sites
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Mar-08-2016
Comments: