CMF / CRF Details
CMF ID: 9689
Install centerline rumble strips (horizontal curves)
Description: Install centerline rumble strips on horizontal curves
Prior Condition: No Prior Condition(s)
Category: Roadway
Study: Examining the Safety Effect of Centerline Rumble Strips on Curves on Rural Two-Lane Roads, Babiceanu and Fontaine, 2018
Star Quality Rating: | [View score details] |
Rating Points Total: | 80 |
Crash Modification Factor (CMF) | |
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Value: | 0.905 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.1 |
Crash Reduction Factor (CRF) | |
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Value: | 9.5 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 10 |
Applicability | |
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Crash Type: | Fixed object,Run off road |
Crash Severity: | All |
Roadway Types: | Not specified |
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 2100 to Maximum of 18000 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 | |
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Date Range of Data Used: | 2004 to 2016 |
Municipality: | |
State: | VA |
Country: | USA |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (crashes): | 108 crashes before, 99 crashes after |
Sample Size (sites): | 130 sites before, 130 sites after |
Sample Size (site-years): | 650 site-years before, 650 site-years after |
Sample Size (miles): | 22 miles before, 22 miles after |
Sample Size (miles): | 110 mile-years before, 110 mile-years after |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Oct 27, 2018 |
Comments: | CMF for off-road fixed object and run-off-road crashes |