CMF / CRF Details
CMF ID: 11028
Improve street lighting illuminance and uniformity
Description: Add or update street lighting to change the illuminance and uniformity along a roadway segment
Prior Condition: Roadway with illuminance max-min ratios less than or equal to 10
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: | 105 |
Crash Modification Factor (CMF) | |
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Value: | 1.391 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.253 |
Crash Reduction Factor (CRF) | |
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Value: | -39.1 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 25.3 |
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 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 | |
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Date Range of Data Used: | 2011 to 2014 |
Municipality: | Tampa |
State: | FL |
Country: | USA |
Type of Methodology Used: |