CMF / CRF Details

CMF ID: 11241

Conversion of stop-controlled intersection to mini roundabout


Prior Condition:  Two-Way, Stop-Controlled (TWSC) / One-Way, Stop-Controlled (OWSC) intersection

Category: Intersection geometry

Study: Safety Effectiveness and the Role of Geometric, Traffic, and Crash History–Related Factors in Converting a Stop-Controlled Intersection to a Miniroundabout, Mishra et al., 2022

Star Quality Rating:3 Stars  [View score details]
Rating Points Total:105
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.09
Crash Reduction Factor (CRF)
Value:61  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:9
Crash Type:All
Crash Severity:K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types:All
Street Type:Two-Way
Minimum Number of Lanes:
Maximum Number of Lanes:
Number of Lanes Direction:Both Directions
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:All
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:mph
Speed Limit Comment:
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:3-leg,4-leg
Traffic Control:Stop-controlled
Major Road Traffic Volume:Minimum of 1970 to Maximum of 14726 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:Minimum of 386 to Maximum of 6846 Annual Average Daily Traffic (AADT)
Average Major Road Volume :7762 Annual Average Daily Traffic (AADT)
Average Minor Road Volume :3668 Annual Average Daily Traffic (AADT)
Development Details
Date Range of Data Used:
Type of Methodology Used:
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 06, 2022