CMF / CRF Details
CMF ID: 479
Provide cloverleaf ramp instead of long ramp
Description:
Prior Condition: No Prior Condition(s)
Category: Interchange design
Study: Revision of the Hand Book of Road Safety Measures, Elvik, R. and Erke, A., 2007
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 30 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.77 |
| Adjusted Standard Error: | 0.2 |
| Unadjusted Standard Error: | 0.11 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 23 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | 20 |
| Unadjusted Standard Error: | 11 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | All |
| Roadway Types: | Not specified |
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| Crash Weather: | Not specified |
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| Area Type: | Not specified |
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| If countermeasure is intersection-based | |
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| Development Details | |
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| Type of Methodology Used: | Regression cross-section |
| Other Details | |
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| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 01, 2009 |
| Comments: | |
