CMF / CRF Details
CMF ID: 9412
Convert signal from span wire to mast arm
Description: Convert signals mounted on span wire to signals mounted on mast arm
Prior Condition: Signalized intersection with signal mounted on a span wire.
Category: Intersection traffic control
Study: Evaluating the Safety Effects of Span Wire to Mast Arm Signal Conversion, Khattak and Fontaine, 2018
Star Quality Rating: | [View score details] |
Rating Points Total: | 80 |
Crash Modification Factor (CMF) | |
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Value: | 0.99 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.076 |
Crash Reduction Factor (CRF) | |
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Value: | 1 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 7.6 |
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: | All |
Traffic Volume: | |
Average Traffic Volume: | |
Time of Day: | All |
If countermeasure is intersection-based | |
Intersection Type: | Not specified |
Intersection Geometry: | 4-leg |
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: | |
Municipality: | |
State: | VA |
Country: | United States |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (sites): | 25 sites before, 25 sites after |