CMF / CRF Details
CMF ID: 10099
Add flashing green to signalized intersection
Description: This is one of the countermeasures to dilemma zone by adding a few seconds of flashing green phase to the signal before facilitate stop/go maneuvers.
Prior Condition: No Prior Condition(s)
Category: Intersection traffic control
Study: Safety Effectiveness Evaluation of Flashing Green Light at Urban Intersections, Valencia-Alaix et al., 2019
| Star Quality Rating: | Cannot Be Rated (Insufficient Information) |
| Rating Points Total: | |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.77 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 23 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability | |
|---|---|
| Crash Type: | All |
| Crash Severity: | O (property damage only) |
| 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: | Urban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Not specified |
| 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 | |
|---|---|
| Date Range of Data Used: | 2009 to 2016 |
| Municipality: | Medellin |
| State: | notusa |
| Country: | Colombia |
| Type of Methodology Used: | Other before/after |
| Sample Size (sites): | 85 sites before, 85 sites after |
| Sample Size (site-years): | 680 site-years before, 680 site-years after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Jul 26, 2019 |
| Comments: | CMF reported here is based on limited information from extended abstract. |
