CMF / CRF Details

CMF ID: 3127

Convert minor-road stop control to all-way stop control


Prior Condition:  Two-way stop sign control with and without flashing beacons.

Category: Intersection traffic control

Study: Evaluation of the Conversion from Two-Way Stop Sign Control to All-Way Stop Sign Control at 53 Locations in North Carolina, Simpson and Hummer, 2010

Star Quality Rating:3 Stars  [View score details]
Rating Points Total:95
Crash Modification Factor (CMF)
Adjusted Standard Error:
Unadjusted Standard Error:0.022
Crash Reduction Factor (CRF)
Value:68.1  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:2.2
Crash Type:All
Crash Severity:All
Roadway Types:All
Street Type:
Minimum Number of Lanes:1
Maximum Number of Lanes:1
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:All
Minimum Speed Limit:25
Maximum Speed Limit:55
Speed Unit:mph
Speed Limit Comment:
Area Type:All
Traffic Volume:
Average Traffic Volume:
Time of Day:Not specified
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:4-leg
Traffic Control:Stop-controlled
Major Road Traffic Volume:Minimum of 680 to Maximum of 15400
Minor Road Traffic Volume:Minimum of 680 to Maximum of 15400
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:1990 to 2009
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jul 15, 2011
Comments:Countermeasure name has been slightly modified for consistency across Clearinghouse