CMF / CRF Details

CMF ID: 11279

Change intersection skew angle

Description: Skew angle is defined as the absolute value of the difference between 90 degrees and the actual intersection angle (see illustration).

Prior Condition:  No Prior Condition(s)

Category: Intersection geometry

Study: Crash Modification Functions for Rural Skewed Intersections, Ingle and Gates, 2022

Image: View the countermeasure image.

 
Star Quality Rating:4 Stars  [View score details]
Rating Points Total:115
Crash Modification Factor (CMF)
Value:1.4
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:-40  (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:All
Crash Severity:All
Roadway Types:Not specified
Street Type:Not Specified
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:Undivided
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Rural
Traffic Volume:
Average Traffic Volume:
Time of Day:Not specified
If countermeasure is intersection-based
Intersection Type:Roadway/roadway (not interchange related)
Intersection Geometry:4-leg
Traffic Control:Stop-controlled
Major Road Traffic Volume:Minimum of 60 to Maximum of 14443 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:Minimum of 11 to Maximum of 7150 Annual Average Daily Traffic (AADT)
Average Major Road Volume :2067 Annual Average Daily Traffic (AADT)
Average Minor Road Volume :596 Annual Average Daily Traffic (AADT)
Development Details
Date Range of Data Used:2010 to 2019
Municipality:
State:MI
Country:USA
Type of Methodology Used:
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jun 11, 2023
Comments:non-animal crashes, CMF for skew angle between 17 and 27 degrees. CMF estimate significant at 0.05 level but not specified/provided in the study.

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