CMF / CRF Details
Replace direct left-turn with right-turn/U-turn
Countermeasure ID: 364
Description:
Prior Condition: No Prior Condition(s)
Category: Access management
Study: Right Turns Followed by U-Turns Versus Direct Left Turns: A Comparison of Safety Issues, Xu, 2001
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 40 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 1.33 |
| Adjusted Standard Error: | 0.92 |
| Unadjusted Standard Error: | 0.18 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -33 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | 92 |
| Unadjusted Standard Error: | 18 |
| Applicability | |
|---|---|
| Crash Type: | Sideswipe |
| Crash Severity: | All |
| Roadway Types: | Principal Arterial Other |
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| Minimum Number of Lanes: | |
| Maximum Number of Lanes: | |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
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| Minimum Speed Limit: | |
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| Speed Limit Comment: | |
| Area Type: | Not specified |
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| If countermeasure is intersection-based | |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | Not specified |
| Traffic Control: | Stop-controlled |
| Major Road Traffic Volume: | |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
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| Development Details | |
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| Date Range of Data Used: | |
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| Type of Methodology Used: | Non-regression cross-section |
| Other Details | |
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| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Dec 01, 2009 |
| Comments: | Countermeasure name has been slightly modified for consistency across Clearinghouse |
