CMF / CRF Details

CMF ID: 9019

Install advanced yield or stop markings and signs

Description: Install advanced yield or stop markings and signs

Prior Condition: No advanced yield or stop markings and signs

Category: Pedestrians

Study: Development of Crash Modification Factors for Uncontrolled Pedestrian Crossing Treatments, Zegeer et al., 2017

 
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Crash Modification Factor (CMF)
Value: 0.8
Adjusted Standard Error:
Unadjusted Standard Error: 0.076
Crash Reduction Factor (CRF)
Value: 20   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 7.6
Applicability
Crash Type: Rear end,Sideswipe
Crash Severity: All
Roadway Types: Minor Arterial
Number of Lanes: 2 to 8
Road Division Type:
Speed Limit:
Area Type: Urban and suburban
Traffic Volume: Minimum of 340 to Maximum of 52892 Annual Average Daily Traffic (AADT)
Average Traffic Volume: 15735 Annual Average Daily Traffic (AADT)
Time of Day: All
If countermeasure is intersection-based
Intersection Type:
Intersection Geometry:
Traffic Control:
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used: 2004 to 2013
Municipality:
State: AZ, FL, IL, MA, NY, NC, OR, VA, WI
Country: USA
Type of Methodology Used: Before/after using empirical Bayes or full Bayes
Sample Size (crashes): 159 crashes before, 335 crashes after
Sample Size (sites): 69 sites before, 69 sites after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Nov-17-2017
Comments: Study sites were a combination of intersection and mid-block locations.