Snow Chains and Mountain Roads

Spain’s coastal regions may offer mild winter sunshine, but the country’s mountains can experience sudden snowfall, icy surfaces, and rapidly changing conditions. Drivers visiting ski resorts or high-altitude villages must be aware that winter regulations are strict. Knowing how to interpret road signs, when to use chains, and how to prepare a hire car can prevent serious problems on the road.

When Snow Chains Are Mandatory

Spain uses clear signage to indicate when snow chains must be fitted. The most important sign for winter drivers is:

• R-402 – Cadenas obligatorias
  This circular blue sign means snow chains must be fitted before proceeding.

Drivers must stop in a safe location to fit the chains. Continuing without them is illegal and can result in fines, but more importantly, it places everyone at risk. Hire car contracts also generally require compliance with all local traffic laws.

Understanding Winter Road Status Colours

During heavy snow, the DGT applies a colour-coded system to major routes:

• Green: Traffic allowed but drive with caution.
• Yellow: Restrictions for heavy vehicles; chains recommended.
• Red: Chains mandatory; no heavy vehicles permitted.
• Black: Road closed to all traffic due to extreme conditions.

Visitors unfamiliar with these rules should check conditions before travelling. Mountain passes can change from green to red within minutes as storms develop.

Check What Your Car Needs

Chains must match tyre size, so taking the correct set is essential. So-called “snow socks” are not always permitted, confirm they are accepted on your planned route; some roads allow only metal chains. Winter tyres, if approved, are an alternative.

Driving Safely in Snow and Ice

Once chains are fitted, drivers should:

• Keep speed low and steady.
• Avoid sudden acceleration or braking.
• Stay in higher gears to reduce wheel spin.
• Maintain generous distances between vehicles.

Remove chains immediately when leaving snowy areas to avoid damaging the tyres and road surface.

Prepare Before Heading Into the Mountains

Visitors planning winter trips should pack warm clothing, water, and a charged mobile phone. Ensure lights, wipers, and windows are clean before climbing into colder regions, where visibility changes rapidly.

A Safer Way to Enjoy Spain’s Winter Landscapes

With the correct equipment, awareness of winter signage, and sensible driving techniques, visitors can enjoy Spain’s mountain regions safely. Snow can transform the landscape into something spectacular — but only when drivers respect the rules and conditions that keep everyone safe.