CMF / CRF Details

CMF ID: 2333

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]
Crash Modification Factor (CMF)
Value: 0.58
Adjusted Standard Error:
Unadjusted Standard Error: 0.07
Crash Reduction Factor (CRF)
Value: 42   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 7
Applicability
Crash Type: Angle
Crash Severity: All
Roadway Types: Not Specified
Number of Lanes:
Road Division Type:
Speed Limit:
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: