CMF / CRF Details
CMF ID: 2723
Replace Incandescent Traffic Signal Bulbs with Light Emitting Diodes (LEDs)
Description: At urban signalized intersections, incandescent traffic signal bulbs are replaced by light emitting diodes (LEDs) to improve signal visibility
Prior Condition: incandescent bulbs in use at traffic signal
Category: Intersection traffic control
Study: Analyzing the Effects of LED Traffic Signals on Urban Intersection Safety, Eustace et al., 2010
Star Quality Rating: | [View score details] |
Rating Points Total: | 85 |
Crash Modification Factor (CMF) | |
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Value: | 1.71 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.156 |
Crash Reduction Factor (CRF) | |
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Value: | -71 (This value indicates an increase in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 15.6 |
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: | Not specified |
If countermeasure is intersection-based | |
Intersection Type: | Not specified |
Intersection Geometry: | Not specified |
Traffic Control: | Signalized |
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: | 1999 to 2007 |
Municipality: | Middletown |
State: | OH |
Country: | USA |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |