CMF / CRF Details
CMF ID: 7779
Install lighting
Description:
Prior Condition: Roadways without street lighting
Category: Highway lighting
Study: Validation and Application of Highway Safety Manual (Part D) in Florida, Abdel-Aty et al., 2014
Star Quality Rating: | [View score details] |
Rating Points Total: | 105 |
Crash Modification Factor (CMF) | |
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Value: | 0.72 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.18 |
Crash Reduction Factor (CRF) | |
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Value: | 28 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 18 |
Applicability | |
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Crash Type: | Single vehicle |
Crash Severity: | All |
Roadway Types: | All |
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: | All |
Minimum Speed Limit: | |
Maximum Speed Limit: | |
Speed Unit: | |
Speed Limit Comment: | |
Area Type: | All |
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: | 2006 to 2010 |
Municipality: | |
State: | FL |
Country: | USA |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (sites): | 45 sites before, 45 sites after |
Sample Size (site-years): | 135 site-years before, 90 site-years after |
Sample Size (miles): | 131.7 miles before, 131.7 miles after |
Sample Size (miles): | 395 mile-years before, 263 mile-years after |