CMF / CRF Details
CMF ID: 120
Install continuous, rolled-in shoulder rumble strips
Description:
Prior Condition: No Prior Condition(s)
Category: Shoulder treatments
Study: Safety Evaluation of Rolled-In Continuous Shoulder Rumble Strips Installed on Freeways, Griffith, M. S., 1999
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 75 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.87 |
| Adjusted Standard Error: | 0.21 |
| Unadjusted Standard Error: | 0.12 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 13 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | 21 |
| Unadjusted Standard Error: | 12 |
| Applicability | |
|---|---|
| Crash Type: | Run off road,Single vehicle |
| Crash Severity: | A (serious injury),B (minor injury),C (possible injury) |
| Roadway Types: | Principal Arterial Other Freeways and Expressways |
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| Crash Weather: | Not specified |
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| Area Type: | All |
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| Development Details | |
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| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
