CMF / CRF Details
CMF ID: 9834
Install edgeline rumble strips at horizontal curve
Description: Install edgeline rumble strips at horizontal curve
Prior Condition: No Prior Condition(s)
Category: Roadway
Study: Safety Evaluation of Edge-Line Rumble Stripes on Rural Two-Lane Horizontal Curves, Himes et al., 2017
Star Quality Rating: | [View score details] |
Rating Points Total: | 90 |
Crash Modification Factor (CMF) | |
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Value: | 0.75 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.19 |
Crash Reduction Factor (CRF) | |
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Value: | 25 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 19 |
Applicability | |
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Crash Type: | Run off road |
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 412 to Maximum of 4268 Annual Average Daily Traffic (AADT) |
Average Traffic Volume: | 1589 Annual Average Daily Traffic (AADT) |
Time of Day: | Night |
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 2012 |
Municipality: | |
State: | KY |
Country: | USA |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (crashes): | 61 crashes before, 17 crashes after |
Sample Size (miles): | 15.59 miles before, 15.59 miles after |
Sample Size (miles): | 90.38 mile-years before, 34.36 mile-years after |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Oct 27, 2018 |
Comments: | The CMF is for Nighttime Run off Road crashes (all severities). |