CMF / CRF Details
CMF ID: 355
Replace direct left-turn with right-turn/U-turn
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) | |
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Value: | 1.21 |
Adjusted Standard Error: | 0.75 |
Unadjusted Standard Error: | 0.15 |
Crash Reduction Factor (CRF) | |
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Value: | -21 (This value indicates an increase in crashes) |
Adjusted Standard Error: | 75 |
Unadjusted Standard Error: | 15 |
Applicability | |
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Crash Type: | Sideswipe |
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: | |
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Speed Limit Comment: | |
Area Type: | Not specified |
Traffic Volume: | |
Average Traffic Volume: | |
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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 : | |
Average Minor Road Volume : |
Development Details | |
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Date Range of Data Used: | |
Municipality: | |
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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 |