CMF / CRF Details

CMF ID: 10244

Install edgelines (tangents and curves)

Description: Install edgelines (tangents and curves)

Prior Condition:  Routes with ADT greater than 400 with only centerline striping.

Category: Delineation

Study: White Paper on Edgeline Stripes on Routes with 400-1,000 AADT (Central District Analysis), Miller. J. P., 2013

 
Star Quality Rating:3 Stars  [View score details]
Rating Points Total:95
Crash Modification Factor (CMF)
Value:0.807
Adjusted Standard Error:
Unadjusted Standard Error:0.122
Crash Reduction Factor (CRF)
Value:19.3  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:12.2
Applicability
Crash Type:All
Crash Severity:K (fatal),A (serious injury)
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:Minimum of 400 to Maximum of 1579 Average Daily Traffic (ADT)
Average Traffic Volume:634 Average Daily Traffic (ADT)
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 2011
Municipality:
State:MO
Country:Various
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):105 crashes before, 46 crashes after
Sample Size (sites):73 sites before, 73 sites after
Sample Size (site-years):219 site-years before, 146 site-years after
Sample Size (miles):570 miles before, 570 miles after
Sample Size (miles):1710 mile-years before, 1140 mile-years after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Dec 07, 2019
Comments:

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