CMF / CRF Details
CMF ID: 121
Install continuous milled-in shoulder rumble strips
Description:
Prior Condition: No Prior Condition(s)
Category: Shoulder treatments
Study: The Effectiveness and Use of Continuous Shoulder Rumble Strips, Perrillo, K., 1998
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 60 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.21 |
| Adjusted Standard Error: | 0.07 |
| Unadjusted Standard Error: | 0.02 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 79 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | 7 |
| Unadjusted Standard Error: | 2 |
| Applicability | |
|---|---|
| Crash Type: | Run off road,Single vehicle |
| Crash Severity: | All |
| 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: | Simple before/after |
