CMF / CRF Details
Install Red-light indicator lights
Countermeasure ID: 8840
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: | 135 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.905 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.042 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 9.5 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability | |
|---|---|
| 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 | |
|---|---|
| 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 |
