CMF / CRF Details
CMF ID: 9431
Install shoulder rumble strips
Description:
Prior Condition: Freeways without rumble strips
Category: Shoulder treatments
Study: Evaluating The Imapct of Rumble Strips on Fatal and Injury Freeway Crashes, Dadashova et al., 2018
Star Quality Rating: | [View score details] |
Rating Points Total: | 75 |
Crash Modification Factor (CMF) | |
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Value: | 0.78 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.19 |
Crash Reduction Factor (CRF) | |
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Value: | 22 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 19 |
Applicability | |
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Crash Type: | Single vehicle |
Crash Severity: | B (minor injury) |
Roadway Types: | All |
Street Type: | |
Minimum Number of Lanes: | 4 |
Maximum Number of Lanes: | 10 |
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: | Urban |
Traffic Volume: | Minimum of 8173 to Maximum of 307666 Annual Average Daily Traffic (AADT) |
Average Traffic Volume: | 78880 Annual Average Daily Traffic (AADT) |
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: | 2005 to 2008 |
Municipality: | |
State: | CA,ME,WA |
Country: | USA |
Type of Methodology Used: | Regression cross-section |
Sample Size (sites): | 321 sites |
Sample Size (site-years): | 963 site-years |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Oct 27, 2018 |
Comments: |