CMF / CRF Details

CMF ID: 9318

Conversion of intersection into single-lane roundabout

Description: Conversion of intersection into single-lane roundabout

Prior Condition: signalized, stop-controlled, yield-controlled and non-controlled intersections

Category: Intersection geometry

Study: Safe roundabouts for cyclists, Jensen, S. U., 2017

Star Quality Rating: 2 Stars   [View score details]
Rating Points Total: 65
Crash Modification Factor (CMF)
Value: 2.33
Adjusted Standard Error:
Unadjusted Standard Error: 0.423
Crash Reduction Factor (CRF)
Value: -133   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 42.3
Crash Type: Vehicle/bicycle
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: All
Minimum Speed Limit: 40
Maximum Speed Limit: 130
Speed Unit: km/h
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: No values chosen.
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:
Country: Denmark
Type of Methodology Used: Before/after using comparison group
Sample Size (crashes): 80 crashes after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jun-17-2018
Comments: Type of bicycle facility at roundabout: Cycle lane