CMF / CRF Details
CMF ID: 66
Changeable Curve Speed Warning signs
Description:
Prior Condition: No Prior Condition(s)
Category: Advanced technology and ITS
Study: An Evaluation of Dynamic Curve Warning Systems in the Sacramento River Canyon, Tribbet, L., McGowen, P., and Mounce, J., 2000
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 0 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 1.13 |
| Adjusted Standard Error: | 1.19 |
| Unadjusted Standard Error: | 0.4 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -13 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | 119 |
| Unadjusted Standard Error: | 40 |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other |
| Street Type: | |
| Minimum Number of Lanes: | |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Rural |
| Traffic Volume: | |
| Average Traffic Volume: | |
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| If countermeasure is intersection-based | |
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| 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: | |
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| Type of Methodology Used: | Simple before/after |
| Other Details | |
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| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 01, 2009 |
| Comments: | |
