CMF / CRF Details

CMF ID: 10679

Install restricted crossing U-turn intersections

Description:

Prior Condition:  No Prior Condition(s)

Category: Intersection geometry

Study: Development of Safety Performance Functions for Restricted Crossing U-Turn Intersections, Ulak et al., 2020

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:85
Crash Modification Factor (CMF)
Value:1.015
Adjusted Standard Error:
Unadjusted Standard Error:0.1085
Crash Reduction Factor (CRF)
Value:-1.5  (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:10.85
Applicability
Crash Type:All
Crash Severity:K (fatal),A (serious injury),B (minor injury),C (possible injury)
Roadway Types:All
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:Divided by Median
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Urban and suburban
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:Signalized
Major Road Traffic Volume:Minimum of 9700 to Maximum of 100467 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:Minimum of 1000 to Maximum of 18218 Annual Average Daily Traffic (AADT)
Average Major Road Volume :38138 Annual Average Daily Traffic (AADT)
Average Minor Road Volume :6828 Annual Average Daily Traffic (AADT)
Development Details
Date Range of Data Used:
Municipality:
State:AL,MD,MI,NC,OH,TX
Country:
Type of Methodology Used:Regression cross-section
Sample Size (crashes):843 crashes
Sample Size (sites):42 sites
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Feb 25, 2021
Comments:This CMF is for Speed Limit greater than 50 mph (with the base condition being Speed Limit of less than or equal to 50 mph).

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