CMF / CRF Details
CMF ID: 11750
Improve street lighting illuminance and uniformity
Description:
Add or update street lighting to change the illuminance and uniformity along a roadway segment
Prior Condition: Lighting fluctuation frequency above 30 per mile given average illuminance is below 0.6 fc
Category: Highway lighting
| Crash Modification Factor (CMF) |
|---|
| Value: | 0.82 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.09 |
| Crash Reduction Factor (CRF) |
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| Value: | 18 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | |
| Applicability |
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| 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 |
| 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 |
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| Date Range of Data Used: | 2018 to 2022 |
| Municipality: | |
| State: | UT |
| Country: | USA |
| Type of Methodology Used: | |
| Other Details |
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| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | May 07, 2025 |
| Comments: | CMF for decreasing lighting fluctuation frequency from above to below 30 per mile given an average illuminance below 0.6 fc. This CMF was developed from a dataset with only Urban Arterial roadway segments located in Salt Lake and Utah counties in Utah. Please take this into consideration when using the CMF for other roadway types and/or in other jurisdictions. |
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