CMF / CRF Details

CMF ID: 2334

Replace 8-inch red signal heads with 12-inch

Description:

Prior Condition:  No Prior Condition(s)

Category: Intersection traffic control

Study: Evaluation of the Safety Effectiveness of Selected Treatments at Urban Signalized Intersections, Srinivasan et al., 2008

 
Star Quality Rating:4 Stars  [View score details]
Rating Points Total:115
Crash Modification Factor (CMF)
Value:0.97
Adjusted Standard Error:
Unadjusted Standard Error:0.06
Crash Reduction Factor (CRF)
Value:3  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:6
Applicability
Crash Type:All
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:
Traffic Volume:
Average Traffic Volume:
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:1990 to 2004
Municipality:Winston-Salem
State:NC
Country:
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (site-years):364 site-years before, 364 site-years after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 01, 2009
Comments: