CMF / CRF Details

CMF ID: 9732

Install cable median barrier

Description: Install cable median barrier

Prior Condition: No Prior Condition(s)

Category: Roadside

Study: Estimating Crash Modification Factors for Lane Departure Countermeasures in Kansas, Dissanayake and Galgamuwa, 2017

Star Quality Rating: 2 Stars   [View score details]
Crash Modification Factor (CMF)
Value: 0.5
Adjusted Standard Error:
Unadjusted Standard Error: 0.096
Crash Reduction Factor (CRF)
Value: 50   (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error: 9.6
Crash Type: All
Crash Severity: All
Roadway Types: Not specified
Number of Lanes: 4
Road Division Type: Divided by Median
Speed Limit: 65-70mph
Area Type: Not specified
Traffic Volume: Minimum of 2670 to Maximum of 79800 Annual Average Daily Traffic (AADT)
Average Traffic Volume: 26920 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: 2009 to 2014
State: KS
Country: USA
Type of Methodology Used: Regression cross-section
Sample Size (sites): 1545 sites
Sample Size (miles): 258.2 miles
Other Details
Included in Highway Safety Manual? No
Date Added to Clearinghouse: Oct-27-2018
Comments: CMF for lane departure crashes