CMF / CRF Details
CMF ID: 11026
Improve street lighting illuminance and uniformity
Description: Add or update street lighting to change the illuminance and uniformity along a roadway segment
Prior Condition: Average lighting level is [0 ft, 0.5fc]
Category: Highway lighting
Study: Development of crash modification factors for roadway illuminance: A matched case-control study, Li et al., 2021
| Star Quality Rating: |  [View score details] |
| Rating Points Total: | 115 |
| Crash Modification Factor (CMF) | |
|---|---|
| Value: | 0.679 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.129 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 32.1 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 12.9 |
| Applicability | |
|---|---|
| Crash Type: | All |
| 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: | Urban and suburban |
| Traffic Volume: | |
| Average Traffic Volume: | |
| Time of Day: | Night |
| If countermeasure is intersection-based | |
| Intersection Type: | |
| Intersection Geometry: | |
| Traffic Control: | |
| Major Road Traffic Volume: | |
| Minor Road Traffic Volume: | |
| Average Major Road Volume : | |
| Average Minor Road Volume : | |
| Development Details | |
|---|---|
| Date Range of Data Used: | 2011 to 2014 |
| Municipality: | Tampa |
| State: | FL |
| Country: | USA |
| Type of Methodology Used: | |
| Other Details | |
|---|---|
| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Mar 16, 2022 |
| Comments: | CMF of increasing the average lighting level from [0 fc, 0.5 fc] to (0.5 fc, 1.0 fc] |
