CMF / CRF Details

CMF ID: 11222

Convert Unsignalized Intersection to Mini-Roundabout

Description:

Prior Condition:  Two-way stop controlled intersection (TWSC) or one-way stop controlled (OWSC) intersection

Category: Intersection geometry

Study: Mini-Roundabout CMF Development, Pulugurtha et al., 2021

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:100
Crash Modification Factor (CMF)
Value:0.41
Adjusted Standard Error:
Unadjusted Standard Error:0.09
Crash Reduction Factor (CRF)
Value:59  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:9
Applicability
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:All
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:2001 to 2018
Municipality:
State:GA,IA,MI,MN,MO,NC,VA,WA
Country:USA
Type of Methodology Used:
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Aug 25, 2022
Comments:

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