CMF / CRF Details

CMF ID: 3127

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

Description:

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: 4 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.319
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
Applicability
Crash Type: All
Crash Severity: All
Roadway Types: All
Number of Lanes: 1
Road Division Type: All
Speed Limit: 25-55
Area Type: All
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
Development Details
Date Range of Data Used: 1990 to 2009
Municipality:
State: NC
Country:
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size Used: Site-years
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

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The information contained in the Crash Modification Factors (CMF) Clearinghouse is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The U.S. Government assumes no liability for the use of the information contained in the CMF Clearinghouse. The information contained in the CMF Clearinghouse does not constitute a standard, specification, or regulation, nor is it a substitute for sound engineering judgment.