CMF / CRF Details
CMF ID: 10243
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: | [View score details] |
Rating Points Total: | 115 |
Crash Modification Factor (CMF) | |
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Value: | 0.848 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.05 |
Crash Reduction Factor (CRF) | |
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Value: | 15.2 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 5 |
Applicability | |
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Crash Type: | All |
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: | 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 | |
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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): | 576 crashes before, 327 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 | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Dec 07, 2019 |
Comments: |