CMF / CRF Details
CMF ID: 2025
Change left turn phasing consistency from 31.6% to 27.3%
Description: Consistency = number of changes/number of intersections
Prior Condition: intersection with opposing left turn movements
Category: Intersection traffic control
Study: Safety Impacts of Left-Turn Phasing Sequence, Qi et al., 2009
Star Quality Rating: | [View score details] |
Rating Points Total: | 45 |
Crash Modification Factor (CMF) | |
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Value: | 0.989 |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Value: | 1.1 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Applicability | |
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Crash Type: | Angle |
Crash Severity: | All |
Roadway Types: | Not Specified |
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: | |
Traffic Volume: | |
Average Traffic Volume: | |
Time of Day: | All |
If countermeasure is intersection-based | |
Intersection Type: | Roadway/roadway (not interchange related) |
Intersection Geometry: | |
Traffic Control: | Signalized |
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: | Houston |
State: | TX |
Country: | |
Type of Methodology Used: | Non-regression cross-section |
Sample Size (sites): | 4 sites |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Dec 01, 2009 |
Comments: |