CMF / CRF Details
CMF ID: 8079
Install a traffic signal
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
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 100 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 1.58 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.116 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | -58 (This value indicates an increase in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 11.6 |
| Applicability | |
|---|---|
| Crash Type: | Rear end |
| 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 | |
|---|---|
| Date Range of Data Used: | 2003 to 2013 |
| Municipality: | |
| State: | FL |
| Country: | |
| Type of Methodology Used: | Before/after using comparison group |
| Sample Size (crashes): | 180 crashes after |
| Sample Size (sites): | 32 sites before, 32 sites after |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Nov 10, 2016 |
| Comments: | Rear-end crashes months 1-29 after signalization |
