CMF / CRF Details

CMF ID: 10450

Install shoulder rumble strips

Description:

Prior Condition: No Prior Condition(s)

Category: Shoulder treatments

Study: Rectangular Rumble Strip Safety Evaluation, Storm et al., 2020

 
Star Quality Rating: 4 Stars   [View score details]
Rating Points Total: 130
Crash Modification Factor (CMF)
Value: 0.76
Adjusted Standard Error:
Unadjusted Standard Error: 0.089
Crash Reduction Factor (CRF)
Value: 24   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 8.9
Applicability
Crash Type: Other
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:
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: 2012 to 2018
Municipality:
State: MN
Country:
Type of Methodology Used: Regression cross-section
Sample Size (crashes): 150 crashes
Sample Size (sites): 50 sites
Sample Size (site-years): 222 site-years
Sample Size (mile-years): 1710.59 mile-years
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Aug-14-2020
Comments: This CMF is for Single Vehicle Run Off Road (SVROR) crashes.