CMF / CRF Details
CMF ID: 9144
Install a traffic signal
Description:
Prior Condition: Unsignalized intersection
Category: Intersection traffic control
Study: A full Bayes before-after study accounting for temporal and spatial effects: Evaluating the safety impact of new signal installations, Sacchia et al., 2016
Star Quality Rating: | [View score details] |
Rating Points Total: | 120 |
Crash Modification Factor (CMF) | |
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Value: | 0.84 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.054 |
Crash Reduction Factor (CRF) | |
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Value: | 16 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 5.4 |
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: | All |
If countermeasure is intersection-based | |
Intersection Type: | Roadway/roadway (not interchange related) |
Intersection Geometry: | Not specified |
Traffic Control: | Stop-controlled |
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: | 2005 to 2013 |
Municipality: | British Columbia |
State: | notusa |
Country: | Canada |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (sites): | 19 sites before, 19 sites after |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Jan 17, 2018 |
Comments: |