CMF / CRF Details

CMF ID: 7295

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:2 Stars  [View score details]
Rating Points Total:60
Crash Modification Factor (CMF)
Value:0.6
Adjusted Standard Error:
Unadjusted Standard Error:
Crash Reduction Factor (CRF)
Value:40  (This value indicates a decrease in crashes)
Adjusted Standard Error:
Unadjusted Standard Error:
Applicability
Crash Type:All
Crash Severity:All
Roadway Types:All
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:Roadway/roadway (not interchange related)
Intersection Geometry:Not specified
Traffic Control:Uncontrolled
Major Road Traffic Volume:
Minor Road Traffic Volume:
Average Major Road Volume :
Average Minor Road Volume :
Development Details
Date Range of Data Used:2004 to 2013
Municipality:
State:CO
Country:
Type of Methodology Used:Before/after using empirical Bayes or full Bayes
Sample Size (crashes):54 crashes before, 38 crashes after
Sample Size (sites):1 sites before, 1 sites after
Sample Size (site-years):6 site-years before, 3 site-years after
Sample Size (miles):.30 miles before, .3 miles after
Sample Size (miles):1.8 mile-years before, .9 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 ramp: I-25/I-225 SB to EB