CMF / CRF Details
CMF ID: 8435
Install intersection conflict warning systems (ICWS) for two-lane at two-lane intersections
Description:
Prior Condition: No intersection conflict warning systems
Category: Signs
Study: Multi-State Safety Evaluation of Intersection Conflict Warning Systems (ICWS), Himes et al, 2016
Star Quality Rating: |
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Crash Modification Factor (CMF) | |
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Value: | 0.78 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.15 |
Crash Reduction Factor (CRF) | |
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Value: | 22 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 15 |
Applicability | |
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Crash Type: | All |
Crash Severity: | All |
Roadway Types: | Not specified |
Number of Lanes: | 2 |
Road Division Type: | |
Speed Limit: | |
Area Type: | Rural |
Traffic Volume: | |
Average Traffic Volume: | |
Time of Day: | Not specified |
If countermeasure is intersection-based | |
Intersection Type: | Roadway/roadway (not interchange related) |
Intersection Geometry: | 4-leg |
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: | |
Municipality: | |
State: | MO |
Country: | |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (crashes): | 37 crashes after |
Sample Size (sites): | 6 sites before, 6 sites after |