CMF / CRF Details
CMF ID: 7289
Install Fixed Automated Spray Technology (FAST)
Description: Fixed Automated Spray Technology (FAST) provides quick, effective service delivery to high-risk locations prone to icy conditions and/or with high traffic volumes. They are designed as a fixed technology for anti-icing target areas (e.g. bridges, tunnels, ramps, other elevated roadways).
Prior Condition: No FAST
Category: Advanced technology and ITS
Study: Safety Effects of Fixed Automated Spray Technology Systems, Veneziano et al., 2015
Star Quality Rating: | [View score details] |
Rating Points Total: | 55 |
Crash Modification Factor (CMF) | |
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Value: | 0.69 |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 0.34 |
Crash Reduction Factor (CRF) | |
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Value: | 31 (This value indicates a decrease in crashes) |
Adjusted Standard Error: | |
Unadjusted Standard Error: | 34 |
Applicability | |
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Crash Type: | All |
Crash Severity: | All |
Roadway Types: | Principal Arterial Interstate |
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: | Rural |
Traffic Volume: | |
Average Traffic Volume: | |
Time of Day: | All |
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: | 1999 to 2011 |
Municipality: | |
State: | CO |
Country: | USA |
Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
Sample Size (crashes): | 14 crashes before, 5 crashes after |
Sample Size (sites): | 1 sites before, 1 sites after |
Sample Size (site-years): | 5 site-years before, 7 site-years after |
Sample Size (miles): | .03 miles before, .03 miles after |
Sample Size (miles): | .15 mile-years before, .21 mile-years after |
Other Details | |
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Included in Highway Safety Manual? | No |
Date Added to Clearinghouse: | Nov 01, 2015 |
Comments: | CMF based on observation of one rural Interstate site: I-25 - MP 172.20 - 172.23 |