CMF / CRF Details

CMF ID: 11129

Road diet (Convert 4-lane undivided road to 2-lanes plus turning lane)

Description:

Prior Condition:  four-lane roadway

Category: Roadway

Study: Development of Road Diet Segment and Intersection Crash Modification Factors, Linda Lim and Michael D. Fontaine, 2022

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:105
Crash Modification Factor (CMF)
Value:0.36
Adjusted Standard Error:
Unadjusted Standard Error:0.16
Crash Reduction Factor (CRF)
Value:64  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:16
Applicability
Crash Type:All
Crash Severity:K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types:Minor Arterial
Street Type:Two-Way
Minimum Number of Lanes:4
Maximum Number of Lanes:4
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:
Speed Limit Comment:
Area Type:Urban and suburban
Traffic Volume:Minimum of 2600 to Maximum of 17000 Annual Average Daily Traffic (AADT)
Average Traffic Volume:
Time of Day:Not specified
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
Traffic Control:
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:
Municipality:
State:VA
Country:
Type of Methodology Used:
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Aug 25, 2022
Comments:This is the CMF of KABC crashes for segments. Bike lanes or buffered bike lane was also installed with the road diet.

View the Full Study Details