CMF / CRF Details
Install a traffic signal
Countermeasure ID: 8085
Description:
Prior Condition: Stop controlled intersection
Category: Intersection traffic control
Study: Estimating safety performance trends over time for treatments at intersections in Florida, Wang et al., 2015
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.284 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.052 |
| Crash Reduction Factor (CRF) |
|---|
| Value: | 71.6 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 5.2 |
| Applicability |
|---|
| Crash Type: | Angle,Left turn |
| 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: | |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | |
| If countermeasure is intersection-based |
| Intersection Type: | Roadway/roadway (not interchange related) |
| Intersection Geometry: | Not specified |
| Traffic Control: | Stop-controlled |
| 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: | 2003 to 2013 |
| Municipality: | |
| State: | FL |
| Country: | |
| Type of Methodology Used: | Before/after using comparison group |
| Sample Size (sites): | 32 sites before, 32 sites after |
| Other Details |
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| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Nov 10, 2016 |
| Comments: | Angle & left-turn crashes months 10-29 after signalization |
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