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Winter Driving

Snow Chain Laws in Europe 2026 — Where the Sign Makes Them Compulsory

Chains are only compulsory where the blue chain sign is posted, and the rule differs by country. Where the sign applies, the 50 km/h limit it carries, and what happens if you ignore it.

TyreMap Editorial Team 5 min read
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Snow chains are among the most misunderstood pieces of winter driving equipment. Many drivers believe they are only needed in extreme conditions, or that modern winter tyres make them unnecessary. In reality, snow chains — or certified textile alternatives — are legally required in specific situations across much of Europe, and carrying them is mandatory in several countries regardless of whether you ultimately need to fit them.

Why Snow Chains Are Still Relevant

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Winter tyres with the three-peak mountain snowflake (3PMSF) symbol are excellent in snow and moderate ice. But on steep mountain roads with deep fresh snow or compacted ice, the additional traction from chains can be the difference between reaching the summit and becoming an obstacle for everyone behind you. Several Alpine passes that remain open in winter can only do so because authorities require chains — or close the road entirely.

Modern alternatives to traditional metal link chains include:

  • Snow socks (AutoSock, SockIt): Textile sleeves that slip over the tyre. Easy to fit, quiet on tarmac, accepted in most countries as alternatives to chains. Less durable than metal chains.
  • Composite chains: Plastic or polymer alternatives to metal chains. Accepted in some countries, not others. Check your destination’s specific rules.
  • Spike tyres: Legal in Scandinavia and Finland during specified winter periods. Not permitted in most other European countries.

Austria — Compulsory Chain Roads

Austria uses “R6” road signs (a tyre with a chain symbol) to designate roads where chains are compulsory regardless of tyre type. On these roads, you must fit chains even if you have winter tyres fitted.
Beyond the R6 sections, Austrian law (StVO) requires that vehicles carry winter tyres or snow chains during winter conditions (October 1 to May 31) when there is snow, slush, or ice on the road. “Winter conditions” is determined by the road surface, not the calendar. Police at Alpine road checks will turn back vehicles without appropriate equipment.

Switzerland — Strict Mountain Pass Rules

Switzerland is the strictest European country on snow chain requirements. Several major mountain passes have designated compulsory chain sections, and road signs are mandatory to obey. The SwissTrails and Viasuisse apps show pass conditions in real time.
Swiss law requires that chains be metal link type or a certified alternative bearing a recognised testing mark (TÜV, ÖNORM, etc.). Snow socks must carry a certification mark to be accepted. Penalties for non-compliance include fines and being turned around at a tunnel or pass entrance.
The Gotthard Pass, Julier Pass, and Flüela Pass all have histories of requiring chains. The Gotthard Tunnel (the road tunnel, not the rail tunnel) occasionally closes with diversions over the pass, where chain requirements apply.

France — Required for Mountain Roads

France requires snow chains on certain mountain roads in the Alps and Pyrenees during winter. The mandatory sign is a round blue sign with a chain symbol. France also accepts snow socks (chaussettes à neige) as a legal alternative to metal chains, provided they bear CE certification.
French mountain resorts have been more proactive than other countries in enforcing chain requirements for vehicles approaching ski stations. The Savoie region around Chamonix, Méribel, and Val d’Isère regularly operates checkpoints where chain or winter tyre compliance is verified.
From November 1, 2024, a new French law (Chaînes ou pneus neige obligatoires) requires that vehicles in 34 mountain departments carry either winter tyres or snow chains in their boot from November to March. This applies even if you are just passing through.

Italy — Northern Regions and Mountain Roads

Italy requires snow chains on Alpine roads in Valle d’Aosta, Trentino-Alto Adige, and other mountain regions during winter. Compulsory sign (chained tyre symbol) applies on specific roads. Winter tyres or chains are compulsory in the northern provinces from October 15 to April 15.
Chains are also occasionally required on the major Brenner Pass route (A22 motorway) connecting Italy and Austria during heavy snowfall, where motorway police deploy at toll booths to check compliance.

Spain — Pyrenean Pass Roads

Snow chains (or certified snow socks) are required in Spain on specific mountain roads in the Pyrenees and Sierra Nevada. The DGT (Dirección General de Tráfico) publishes pass conditions, and local police enforce chain requirements at access points to ski resorts. Spain accepts AutoSock and similar certified textile products as legal chain alternatives.

Scandinavia — Generally No Chain Requirements

The Scandinavian countries (Norway, Sweden, Finland, Denmark) rely predominantly on studded or winter tyres rather than chains. Spiked tyres are legal during defined winter seasons. Snow chains are not commonly required by law in these countries, and on compacted snow roads, spiked winter tyres provide superior grip to chains.
Norway permits studded tyres from October to late April (the exact date varies by region). Sweden and Finland have similar windows. Driving through Norway on chains (rather than winter or spiked tyres) is generally uncommon.

How to Fit Snow Chains Correctly

Fitting snow chains incorrectly is one of the most common winter driving mistakes. A poorly fitted chain can damage your car’s wheel arch, brake system, or ABS sensors within a few kilometres.

Before the winter season:

  1. Purchase chains sized for your specific tyre (e.g., 225/55R17). Check the chain manufacturer’s compatibility guide.
  2. Practice fitting them at home in your driveway — not on a dark mountainside in a blizzard.
  3. Drive a short distance and check that the chains are tight and seated correctly.

On the road:

  1. Pull over to a safe, flat surface. Do not attempt to fit chains on a slope.
  2. Lay the chain flat behind the tyre, drive forward one tyre length, and apply the brakes.
  3. Connect the chain at the back first, then the front. Ensure the hook closure is on the outside (away from the vehicle).
  4. Drive 20–30 metres and re-tension. Chains stretch slightly after initial loading.
  5. Maximum speed: 50 km/h (30 km/h is safer and extends chain life).
  6. Remove chains as soon as you reach a clear (ice-free) road section — driving on bare tarmac with chains is hard on the road surface, the chains, and your car.

Carrying a pair of latex gloves in your chain bag makes fitting considerably less unpleasant in cold, wet conditions.

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Frequently Asked Questions

Austria requires vehicles to carry snow chains on certain designated mountain roads when sign-posted (R6 signs indicating compulsory snow chains). Even without signs, chains are strongly recommended on Alpine passes in winter. Winter tyres are also required from November 1 to April 15 in winter road conditions.

Check tyre requirements for your trip

Snow socks (textile traction devices) are accepted as an alternative to traditional chains in France, Spain, and some other countries. However, in Switzerland and Austria, only certified metal chains (or textile alternatives with a specific TÜV or equivalent certification) are accepted on compulsory-chain roads.

Check tyre requirements for your trip

Only Germany, Czechia and Slovenia set a chain speed limit in law — 50 km/h in all three. Elsewhere (Austria, Switzerland, France, Italy, Spain, Slovakia) there is no statutory figure, but chain manufacturers cap their products at 50 km/h and some at 30. Drive to 50 km/h regardless: above that a chain can break loose and damage the car, and you lose the warranty.

Check tyre requirements for your trip

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