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) | |
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Value: | 0.77 |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Crash Reduction Factor (CRF) | |
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Value: | 23 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: |
Applicability | |
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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 | |
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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 | |
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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. |