CMF / CRF Details

CMF ID: 7283

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:3 Stars  [View score details]
Rating Points Total:75
Crash Modification Factor (CMF)
Value:0.44
Adjusted Standard Error:
Unadjusted Standard Error:0.11
Crash Reduction Factor (CRF)
Value:56  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:11
Applicability
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:Urban
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
Date Range of Data Used:1998 to 2012
Municipality:
State:CO
Country:USA
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):22 crashes before, 20 crashes after
Sample Size (sites):1 sites before, 1 sites after
Sample Size (site-years):6 site-years before, 15 site-years after
Sample Size (miles):.03 miles before, .03 miles after
Sample Size (miles):.18 mile-years before, .45 mile-years after
Other Details
Included in Highway Safety Manual?No
Date Added to Clearinghouse:Nov 01, 2015
Comments:CMF based on observation of one urban Interstate site: I-25 - MP 233.08 - 233.11