CMF / CRF Details

CMF ID: 5267

Install centerline and shoulder rumble strips

Description: Milled or rolled rumble strips.

Prior Condition:  No centerline or rumble strips present

Category: Roadway

Study: Rumble Strips in North Dakota: A Comparison of Road Segments, Safety, and Crash Patterns, A. Kubas, P. Kayabas, K. Vachal, and M. Berwick, 2013

 
Star Quality Rating:1 Star  [View score details]
Rating Points Total:10
Crash Modification Factor (CMF)
Value:1.6
Adjusted Standard Error:
Unadjusted Standard Error:0.564
Crash Reduction Factor (CRF)
Value:-60  (This value indicates an increase in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:56.4
Applicability
Crash Type:Other
Crash Severity:All
Roadway Types:Not specified
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:
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:2007 to 2011
Municipality:
State:ND
Country:
Type of Methodology Used:Simple before/after
Sample Size (crashes):13 crashes before, 25 crashes after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 02, 2013
Comments:Traffic volume was reported in VMT. VMT before was 86,522,040 vehicle-miles and 104,286,686 after. Roll-over crashes