CMF / CRF Details

CMF ID: 7252

Install centerline rumble strips

Description:

Prior Condition:  Minimum paved roadway width of 20ft

Category: Roadway

Study: Safety Impacts of a Statewide Centerline Rumble Strip Installation Program, Kay et al., 2015

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:100
Crash Modification Factor (CMF)
Value:0.721
Adjusted Standard Error:
Unadjusted Standard Error:0.002
Crash Reduction Factor (CRF)
Value:27.9  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:0.2
Applicability
Crash Type:Angle,Head on,Rear end,Sideswipe,Single vehicle,Other
Crash Severity:B (minor injury)
Roadway Types:Principal Arterial Other
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:
Average Traffic Volume:4072 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:2005 to 2013
Municipality:
State:MI
Country:USA
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):403 crashes before, 307 crashes after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Nov 01, 2015
Comments:Target Crashes (C Injury) = angle, head-on, other, rear end, sideswipe opposite, sideswipe same, and single vehicle