CMF / CRF Details

CMF ID: 2335

Install dual red signal lenses

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: 110
Crash Modification Factor (CMF)
Value: 1.05
Adjusted Standard Error:
Unadjusted Standard Error: 0.13
Crash Reduction Factor (CRF)
Value: -5   (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 13
Applicability
Crash Type: Angle
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 :
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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): 112 site-years before, 112 site-years after
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Dec-01-2009
Comments: