CMF / CRF Details

CMF ID: 9742

Presence of driveway on an intersection approach corner


Prior Condition:  No driveways within 50 feet of any approach corner at a signalized intersection

Category: Access management

Study: Safety Evaluation of Corner Clearance at Signalized Intersections, Le et al., 2018

Star Quality Rating:5 Stars  [View score details]
Rating Points Total:150
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.09
Crash Reduction Factor (CRF)
Value:21  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:9
Crash Type:Rear end
Crash Severity:All
Roadway Types:Not specified
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:
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Not specified
Traffic Volume:
Average Traffic Volume:
Time of Day:All
If countermeasure is intersection-based
Intersection Type:Roadway/roadway (not interchange related)
Intersection Geometry:4-leg
Traffic Control:Signalized
Major Road Traffic Volume:Minimum of 10406 to Maximum of 93000 Annual Average Daily Traffic (AADT)
Minor Road Traffic Volume:Minimum of 500 to Maximum of 48000 Annual Average Daily Traffic (AADT)
Average Major Road Volume :37945 Annual Average Daily Traffic (AADT)
Average Minor Road Volume :8598 Annual Average Daily Traffic (AADT)
Development Details
Date Range of Data Used:2009 to 2011
Country:United States
Type of Methodology Used:Regression cross-section
Sample Size (crashes):1898 crashes
Sample Size (sites):275 sites
Sample Size (site-years):825 site-years
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Oct 27, 2018
Comments:This CMF is for the presence of a driveway on 1 approach corner within 50 feet of a signalized intersection compared to no driveways present.