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Current slippery roads hazards

Updated on: 26.09.2020, 20:23

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Danger level 1 (No or minor danger)
Danger level 2 (Moderate danger)
Danger level 3 (Considerable danger)
Danger level 4 (High danger)
Danger level 5 (Very high danger)
No danger level
Danger level 1 (No or minor danger)

No evaluation

Danger level 2 (Moderate danger)

Impact:

Local or widespread risk of skidding

Recommended action:

keep an eye on local weather developments and stay informed; always follow the official advice.

Packed snow:

less than 4 cm, road temperature of < 0 degrees

Black ice:

wet roads that have frozen over

Icy roads:

freezing rain

Danger level 3 (Considerable danger)

Impact:

  • Sudden, acute danger of skidding
  • Icy roads to the extent of being impassable
  • Disruption to air travel
  • Branches breaking and falling as a result of their ice load

Recommended action:

keep an eye on local weather developments and stay informed; always follow the official advice.

Freezing rain: 

up to 2 mm

Danger level 4 (High danger)

Impact:

  • Sudden, acute danger of skidding;
  • Road and air travel brought to a standstill;
  • Disruption to rail travel;
  • Falling branches or trees as a result of their ice load;
  • Interruption of electricity supply and/or telephone network, particularly in regions that are not easily accessible.

Recommended action:

keep an eye on local weather developments and stay informed; always follow the official advice.

Freezing rain:

over 2 mm (total precipitation volume freezing on the ground)

Danger level 5 (Very high danger)

It is not possible to make a distinction for larger deposits of precipitation. Widespread ice formation on roads over a sustained period is a rare occurrence in Switzerland.

 

No danger level

No evaluation

Current slippery roads hazards in Switzerland

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