CMF / CRF Details

CMF ID: 10410

Install centerline and shoulder rumble strips

Description: Milled or rolled rumble strips.

Prior Condition: No Prior Condition(s)

Category: Roadway

Study: Evaluation of the safety effectiveness of lane departure countermeasures on two-lane undivided roadways using crash modification factors, Dissanayake and Galgamuwa, 2019

 
Star Quality Rating: 3 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.68
Adjusted Standard Error:
Unadjusted Standard Error: 0.041
Crash Reduction Factor (CRF)
Value: 32   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 4.1
Applicability
Crash Type: Run off road
Crash Severity: All
Roadway Types: Not specified
Number of Lanes: 2
Road Division Type: Undivided
Speed Limit:
Area Type: Rural
Traffic Volume: Minimum of 30 to Maximum of 15900 Annual Average Daily Traffic (AADT)
Average Traffic Volume: 1596 Annual Average Daily Traffic (AADT)
Time of Day: Not specified
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: 2009 to 2014
Municipality:
State: KS
Country: USA
Type of Methodology Used: Case-control
Sample Size (crashes): 8487 crashes
Sample Size (sites): 22061 sites
Sample Size (miles): 9027 miles
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Jun-01-2020
Comments: CMF for lane departure crashes on tangent road segments