CMF / CRF Details
CMF ID: 11336
Changing left turn phasing from protected-permissive to flashing yellow arrow (FYA)
Description: CMFs are calculated the intersection level and not the treated approach(es) level.
Prior Condition: Protected-Permissive Left Turns
Category: Intersection traffic control
Study: Safety Performance Evaluation of Flashing Yellow Arrow: Time-of-Day vs 24-hour Operations, Zhang et al., 2023
Image: View the countermeasure image.
Star Quality Rating: | [View score details] |
Rating Points Total: | 115 |
Crash Modification Factor (CMF) | |
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Value: | 0.58 |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Value: | 42 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Applicability | |
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Crash Type: | All |
Crash Severity: | K (fatal), A (serious injury), B (minor injury), C (possible injury) |
Roadway Types: | All |
Street Type: | Two-Way |
Minimum Number of Lanes: | |
Maximum Number of Lanes: | |
Number of Lanes Direction: | |
Number of Lanes Comment: | |
Crash Weather: | All |
Road Division Type: | |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | Urban and suburban |
Traffic Volume: | |
Average Traffic Volume: | |
Time of Day: | All |
If countermeasure is intersection-based | |
Intersection Type: | Roadway/roadway (not interchange related) |
Intersection Geometry: | No values chosen. |
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: | 2016 to 2021 |
Municipality: | Tucson |
State: | AZ |
Country: | USA |
Type of Methodology Used: |