Key:winter_service:priority
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| Description |
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Describes the priority level of winter service on the highway. 
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| Group: highways |
| Used on these elements |
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| Useful combination |
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The =* key is used in combination with the winter_service=* key to describe the priority level of winter service on the highway. Used values vary per area.
Values
Finland
Finnish Transport Agency classification
Classification details and a map of road classifications can be found on the agency's web site.
| Priority class | Description |
|---|---|
| FI:Ise | Road usually clear. Salt is used. |
| FI:Is | Road usually clear. Salt is used. |
| FI:I | Road mostly clear. Salt is used. |
| FI:Ib | Road is serviced on a high level, but usually without salt. |
| FI:TIb | Urban road which is serviced on a high level, but usually without salt. |
| FI:II | Road is serviced on a level that allows safe traffic with care. |
| FI:III | Road is serviced on a level that allows safe traffic with care. Winter service after weather changes takes longer, and during that time the road may require special care to drive. |
France
Some (all?) areas in France use a 4-rank classification according to their importance in the network, as with highway=*. Exclusively for winter service priority, not presuming about the means used:
| Priority class | Description |
|---|---|
| FR:N1 | Major route, it should be possible to use it without winter equipment such as snow chains (not accounting for special rules making them mandatory). |
| FR:N2 | Standard route where most of the serviced routes are put into, quality depending on the available operator means. |
| FR:N3 | Minor route, winter equipment are highly recommended as the service is lessened be it through salt and grit, or lower frequency. |
| no | No planned service. The users alone are responsible for their safety on those routes when winter weather occurs. |
On top of that there's a classification about road's conditions. That's where each operator put the standard road condition for each aforementioned priority, and a lower limit under which additional methods could be used:
| Priority class | Description |
|---|---|
| FR:C1 | Clear roads. |
| FR:C2 | Minor presence of snow or ice, users should navigate cautiously. |
| FR:C3 | Presence of snow or ice, some important delay should be expected. |
| FR:C4 | Road deemed unusable as is, use at your own risks. |
United States
Washington
Seattle
Classification is based on Seattle Department of Transportation (SDOT) Winter Weather Storm Response Plan (WWSRP) Level of Service (LOS) designations.
The value of =* on a given highway is equivalent to the value of the SI_LOS=* field for that highway in the Snow and Ice Routes dataset. Additional details can be found on the SDOT Winter Weather Response webpages.
| Priority class | Description |
|---|---|
| 1 | "Gold" - all travel lanes clear of snow and ice |
| 2 | "Emerald" - one travel lane in each direction clear of snow and ice |