CMF / CRF Details
CMF ID: 2834
Install Cargill SafeLane anti-icing pavement overlay system on bridges
Description:
The Cargill SafeLane overlay system uses aggregate that absorbs and stores liquid deicing chemicals that is released to help prevent frost and ice formation on roadway surfaces.
Prior Condition: No Prior Condition(s)
Category: Roadway
| Crash Modification Factor (CMF) |
|---|
| Value: |  |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 0.21 |
| Crash Reduction Factor (CRF) |
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| Value: | 73 (This value indicates a decrease in crashes) |
| Adjusted Standard Error: | |
| Unadjusted Standard Error: | 20.7 |
| Applicability |
|---|
| Crash Type: | All |
| Crash Severity: | K (fatal),A (serious injury),B (minor injury),C (possible injury) |
| Roadway Types: | Not Specified |
| 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: | |
| 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: | 2004 to 2009 |
| Municipality: | |
| State: | MN |
| Country: | USA |
| Type of Methodology Used: | Simple before/after |
| Sample Size (site-years): | 7 site-years before, 5.25 site-years after |
| Other Details |
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| Included in Highway Safety Manual? | No |
| Date Added to Clearinghouse: | Mar 21, 2011 |
| Comments: | On bridge decks. Only accidents which were reported for poor road surface conditions (e.g. wet, snow, ice, freezing rain. frost, etc.) were included. The number of crashes in the after period were not reported in this study, however, they have been recorded as 300 to give 10 points as a beneift of doubt for one or more of the following: (1) number of miles/sites in the reference/treatment group, (2) number of crashes in the references/treatment group, (3) reporting AADTs for the aggregate dataset but not for the disaggragate dataset used for CMF development. |
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