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Description of Road Conditions and Visibility

Road Conditions

Road is Bare

All wheels of a vehicle are on a bare surface.

Illustration of bare road

Bare includes:
  • Bare and dry: Most of the road surface is bare.
  • Bare and wet: Most of the road surface is moist.

Road is Partly Covered

Two wheels of a vehicle are on a bare surface.

Illustration of partly covered road

Partly covered includes:
  • Partly Ice Covered: Two wheels on bare surface and other wheels likely on ice.
  • Partly Snow Covered: Two wheels on bare surface and other wheels likely on loose snow.
  • Partly Snow Packed: Two wheels on bare surface other wheels likely on snow bonded with road.

Road is Covered

All wheels of a vehicle are on snow or ice.

Illustration of covered road

Covered includes:
  • Ice Covered: All wheels are on ice.
  • Snow Covered: All wheels are on loose snow.
  • Snow Packed: All wheels are on snow bonded to road.


Visibility definitions

Visibility is Good


Illustration of good visibility

Visibility is more than 500 metres over the entire section.

Visibility is Fair


Illustration of fair visibility

Visibility is between 250 and 500 metres at specific locations.

Visibility is poor


Illustration of poor visibility

Visibility is reduced to less than 250 metres at specific locations.