CMF / CRF Details
CMF ID: 6974
Install centerline and shoulder rumble strips
Description: Milled or rolled rumble strips.
Prior Condition: No rumble strips in PA and MO. Existing shoulder rumble strips in KY (CL rumble strips as retrofits)
Category: Roadway
Study: Safety Evaluation of Centerline Plus Shoulder Rumble Strips, Persaud et al., 2015
Star Quality Rating: | [View score details] |
Rating Points Total: | 140 |
Crash Modification Factor (CMF) | |
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Value: | 0.702 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.045 |
Crash Reduction Factor (CRF) | |
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Value: | 29.8 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 4.5 |
Applicability | |
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Crash Type: | 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 3200 to Maximum of 26118 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: | |
Municipality: | |
State: | KY,MO,PA |
Country: | USA |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |