CMF / CRF Details

CMF ID: 2431

Install new fluorescent curve signs or upgrade existing curve signs to fluorescent sheeting

Description: Enhancing delineation along curves by installing new or replacing existing warning signs, curve delineation signs, and/or post mounted delineators. Warning signs include curve ahead or suggested speed limit and curve delineation signs include chevrons and horizontal arrows.

Prior Condition:  No sign or sign without fluorescent sheeting

Category: Signs

Study: Safety Evaluation of Improved Curve Delineation, Srinivasan et al., 2009

 
Star Quality Rating:5 Stars  [View score details]
Rating Points Total:150
Crash Modification Factor (CMF)
Value:0.82
Adjusted Standard Error:
Unadjusted Standard Error:0.077
Crash Reduction Factor (CRF)
Value:18  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:7.7
Applicability
Crash Type:Non-intersection
Crash Severity:All
Roadway Types:All
Street Type:
Minimum Number of Lanes:2
Maximum Number of Lanes:2
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:Undivided
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Rural
Traffic Volume:Minimum of 895 to Maximum of 20479 Annual Average Daily Traffic (AADT)
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:1997 to 2006
Municipality:
State:CT
Country:
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Jan 01, 1970
Comments: