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Andorra road conditions and traffic: colours, chains and routes
How to read the Mobilitat map and prepare your winter trip
Traffic and road conditions in Andorra change quickly in winter, so the definitive source is always Mobilitat, the official service, with an updated map, cameras and incidents. You won’t find today’s alerts here: we explain how to read that map, what equipment you need and how to reach Grau Roig from Spain and France, so you know what to do when you see an alert.
What each colour means
In winter, Mobilitat classifies roads by phases. This table follows the official Mobilitat a l’hivern 2025 guide, with the green level from the Andorran Government’s sheet:
| Colour | Situation | Limit | What it requires |
|---|---|---|---|
| Green | Traffic not affected | Below 80 km/h | Caution: watch for ice on wet roads and on clear nights |
| Yellow | Snow on the road | 60 km/h | Winter tyres or equipment. Banned for motorcycles, mopeds and personal mobility vehicles |
| Orange | Dangerous road, ice | 50 km/h | Chains for vehicles over 3,500 kg. Articulated vehicles advised not to travel |
| Red | Very adverse conditions | 30 km/h | Chains for all vehicles. Banned for goods vehicles over 19,000 kg. Postpone your trip if you can |
| Black | Impassable road | Closed | No travel, except winter maintenance and service vehicles |
Do not confuse this with the traffic density legend that Mobilitat also shows: free-flowing, slow, heavy and queues. That one tells you how many cars there are; the snow one tells you the state of the road surface.
Chains and tyres in Andorra
Do you need chains? It depends on the colour of the day, but come prepared. Winter equipment is mandatory from 1 November to 15 May on all roads in the Principality when the road is partly or fully covered in snow or ice, according to the official guide. The Envalira tunnel gives the same dates.
- Winter tyres: on all four wheels and with at least 3 mm of tread.
- Metal or textile chains: on the driven wheels, only when the tarmac is covered in snow, and without exceeding 50 km/h. Try them before you travel, because sizes vary.
- Studded tyres: only from 1 November to 15 May.
Also carry an ice scraper, a torch, warm clothing and comfortable footwear. Don’t overtake a snowplough at work and, if you become stranded, do not leave the vehicle unless you have safe shelter.
Envalira pass and tunnel
Grau Roig lies next to the crossing between Andorra and France, so this affects you if you arrive via Pas de la Casa. The Envalira tunnel is 2,879 m long, sits at around 2,050 m and avoids climbing the pass, at 2,409 m. It links the CG-2 road with the French RN22, and its west entrance is about 300 m from the Grau Roig turn-off.
It is a toll road: in 2026 it costs €8.10 for cars and €4.80 for motorcycles. According to the same report, it is free if bad weather closes the pass. Check the current rate before you travel.
Routes to Grau Roig
These distances and times are a guide, calculated without queues or snow. In winter, please allow extra time.
From Spain
You can enter at the La Seu d’Urgell border, on the N-145, and cross the country on the CG-1 and CG-2. Alternatively, you can travel via Puigcerdà and enter through Pas de la Casa, which we usually recommend if you are coming from Barcelona.
- Barcelona: about 190 km (2 h 45 min)
- Lleida: about 175 km (3 h)
- Huesca: about 270 km (4 h 10 min)
Before you leave, consult the DGT traffic information or call 011. The DGT has its own snow colour scale, so don’t assume it matches Andorra’s.
From France
The most direct route goes through L’Hospitalet-près-l’Andorre and Pas de la Casa. Part of the journey is on a toll road, which we recommend for the distance it saves.
- Toulouse: about 165 km (2 h 20 min)
- Montpellier: about 290 km (4 h)
- Bordeaux: about 405 km (4 h 45 min)
In France, check Bison Futé. Prefectures can close the RN320 and RN22 because of snow or restrict lorries on the RN20, as happened in January 2026. Ariège and Pyrénées-Orientales are among the departments covered by the Loi Montagne: from 1 November to 31 March, in signposted municipalities, you need 3PMSF tyres or chains or textile snow socks.
Where to get information before you leave
- Mobilitat: map, cameras, app with alerts and telephone 1802.
- Weather: meteo.ad and Ràdio Nacional d’Andorra, 94.2 FM.
- Andorran police: 110.
If you are staying at Hotel Grau Roig, listed in the MICHELIN Guide, you have a distinct advantage: it is right on the slopes, so you can do without the car for much of your stay. To plan your trip, see also the Grau Roig slopes, the lift pass prices and what to do in Andorra. If you enjoy driving, save the passes for good weather with our mountain roads guide.