CMF / CRF Details

CMF ID: 6131

Install cable median barrier

Description:

Install cable median barrier

Prior Condition:  No cable median barrier installed

Category: Roadside

Study: Effectiveness of various safety improvements in reducing crashes on Wyoming roadways, Zebulon C. Coulter Khaled Ksaibati, 2013

 
Star Quality Rating:1 Star  [View score details]
Rating Points Total:10
Crash Modification Factor (CMF)
Value:0.63
Adjusted Standard Error:
Unadjusted Standard Error:0.36
Crash Reduction Factor (CRF)
Value:38  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:36
Applicability
Crash Type:Cross median
Crash Severity:B (minor injury),C (possible injury)
Roadway Types:Principal Arterial Interstate
Street Type:
Minimum Number of Lanes:
Maximum Number of Lanes:
Number of Lanes Direction:
Number of Lanes Comment:
Crash Weather:Not specified
Road Division Type:Divided by Median
Minimum Speed Limit:
Maximum Speed Limit:
Speed Unit:
Speed Limit Comment:
Area Type:Rural
Traffic Volume:Minimum of 7000 to Maximum of 13500 Annual Average Daily Traffic (AADT)
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:2006 to 2010
Municipality:
State:WY
Country:USA
Type of Methodology Used:Simple before/after
Sample Size (crashes):8 crashes before, 5 crashes after
Sample Size (sites):5 sites before, 5 sites after
Sample Size (site-years):10 site-years before, 10 site-years after
Sample Size (miles):103 miles before, 103 miles after
Sample Size (miles):206 mile-years before, 206 mile-years after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Mar 11, 2015
Comments:B + C injuries.

View the Full Study Details