CMF / CRF Details
CMF ID: 8838
Install Red-light indicator lights
Description: Red-light indicator lights are mounted on the signal head or on the mast arm. The indicator activates simultaneously with the red interval, allowing an enforcement officer downstream to identify if a vehicle has violated the red interval.
Prior Condition: 4-legged signalized intersection without RLIL
Category: Advanced technology and ITS
Study: Safety Evaluation of Red-Light Indicator Lights in Florida, Himes et al., 2017
Star Quality Rating: | [View score details] |
Rating Points Total: | 115 |
Crash Modification Factor (CMF) | |
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Value: | 0.989 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.079 |
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: | Not specified |
Traffic Volume: | |
Average Traffic Volume: | |
Time of Day: | All |
If countermeasure is intersection-based | |
Intersection Type: | Roadway/roadway (not interchange related) |
Intersection Geometry: | 4-leg |
Traffic Control: | Signalized |
Major Road Traffic Volume: | Minimum of 5900 to Maximum of 80500 Annual Average Daily Traffic (AADT) |
Minor Road Traffic Volume: | Minimum of 845 to Maximum of 62666 Annual Average Daily Traffic (AADT) |
Average Major Road Volume : | 35841 Annual Average Daily Traffic (AADT) |
Average Minor Road Volume : | 13934 Annual Average Daily Traffic (AADT) |
Development Details | |
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Date Range of Data Used: | 2003 to 2012 |
Municipality: | |
State: | FL |
Country: | USA |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |