CMF / CRF Details
CMF ID: 7728
Install flashing yellow arrow
Description:
Install flashing yellow arrow
Prior Condition: Permissive phase of the PPLT control operated with a circular green indication.
Category: Intersection traffic control
| Crash Modification Factor (CMF) |
|---|
| Value: | 1.047 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Crash Reduction Factor (CRF) |
|---|
| Value: | -4.7 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability |
|---|
| Crash Type: | Left turn |
| Crash Severity: | All |
| Roadway Types: | All |
| Street Type: | |
| Minimum Number of Lanes: | 2 |
| Maximum Number of Lanes: | 7 |
| Number of Lanes Direction: | |
| Number of Lanes Comment: | |
| Crash Weather: | Not specified |
| Road Division Type: | All |
| Minimum Speed Limit: | |
| Maximum Speed Limit: | |
| Speed Unit: | |
| Speed Limit Comment: | |
| Area Type: | Urban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | All |
| If countermeasure is intersection-based |
| Intersection Type: | |
| Intersection Geometry: | 3-leg,4-leg |
| Traffic Control: | Signalized |
| Major Road Traffic Volume: | Minimum of 3250 to Maximum of 37500 Average Daily Traffic (ADT) |
| Minor Road Traffic Volume: | Minimum of 63 to Maximum of 14700 Average Daily Traffic (ADT) |
| Average Major Road Volume : | 17215 Average Daily Traffic (ADT) |
| Average Minor Road Volume : | 4576 Average Daily Traffic (ADT) |
| Development Details |
|---|
| Date Range of Data Used: | 2007 to 2013 |
| Municipality: | Peoria |
| State: | IL |
| Country: | USA |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 155 crashes before, 57.04 crashes after |
| Sample Size (sites): | 74 sites before, 74 sites after |
| Sample Size (site-years): | 222 site-years before |
| Other Details |
|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Mar 08, 2016 |
| Comments: | CMFs of left-turn related crashes on signalized intersections, including roadway with roadway and interchange related intersections. Applies to approaches with dedicated left turn lanes and PPLT phasing before and after. Nearby intersections had supplemental sign "Left Turn Yield on Flashing Yellow Arrow" mounted on mast arm. |
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