CMF / CRF Details
CMF ID: 7287
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) | |
|---|---|
| Value: | 0.77 |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.16 |
| Crash Reduction Factor (CRF) | |
|---|---|
| Value: | 23 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 16 |
| 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: | 1997 to 2013 |
| Municipality: | |
| State: | CO |
| Country: | USA |
| Type of Methodology Used: | Before/after using empirical Bayes or full Bayes |
| Sample Size (crashes): | 27 crashes before, 33 crashes after |
| Sample Size (sites): | 1 sites before, 1 sites after |
| Sample Size (site-years): | 6 site-years before, 10 site-years after |
| Sample Size (miles): | .13 miles before, .13 miles after |
| Sample Size (miles): | .78 mile-years before, 1.30 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 139.75 - 139.88 |
