Sleeping in your car: what is allowed, what is not and how to do it safely

If you get tired on a long drive, cannot find a room, or simply want to bridge a night in an ordinary car, SUV or estate, you quickly ask yourself: may I sleep in the car here? The honest answer is: often yes, but not everywhere and not without conditions. This article gives examples from Europe and the USA. It is orientation, not legal advice; local signs and the responsible authority always decide.

Sleeping is not camping

The same idea applies almost everywhere: a car may stand where parking is allowed, and sleeping in it does not automatically break a rule. Trouble starts with camping behaviour such as unfolded chairs, a table, a grill or settling in for good. Litter and a stay of several days can also lead authorities to ban overnight stops at a place.

Examples from Europe

In Germany, ADAC says that the road traffic regulations generally allow sleeping in your own car, as long as you are not in a no-stopping zone, on a paid car park without a ticket or on private land without permission. For Germany, ÖAMTC (there in the context of motorhomes) mentions a single overnight stay of at most ten hours to restore fitness to drive; this figure is not in the ADAC text we read. It is a guide as of 2026, not a licence for several nights.

In Austria the federal state decides. According to ÖAMTC (as of 2026, covering motorhomes and tents together), Tyrol, Vienna, Carinthia and Lower Austria generally prohibit free camping, while Styria and Salzburg allow it under conditions. Fines of up to €14,500 are possible in protected areas. For Switzerland, TCS says wild camping is not generally forbidden but heavily restricted; it is regulated canton by canton, and municipalities can add rules. It names Aargau and Obwalden as examples where one night is possible under conditions. Nature protection zones and the National Park are off limits. TCS adds that sleeping in a car is expressly banned in some cantons, expressly allowed in others and merely tolerated elsewhere.

For France, ÖAMTC lists bans on the coast and near many sights, among other places. For Italy and Spain we found no reliable, uniform rule, and responsibility there lies, as far as we know, with regions and municipalities. That is one more reason to ask locally, for example at the town hall or tourist office, rather than rely on forums.

Examples from the USA

The USA has no federal rule either. States, counties and cities treat sleeping in a vehicle differently, and many cities have their own ordinances. Highway rest areas are one example where the operators, usually state transport agencies, set their own time limits and bans; Jalopnik reports limits ranging from three hours in Florida to 48 hours in Michigan, and no official limit in some other states, as examples that may have changed. Signs at the rest area or the website of that state's roads agency will tell you. A Walmart car park is not a given. Outdoorsy, quoting Walmart's statement on RV parking, says that permission comes from the individual store manager, depending on space and local laws, so this is an example for RVs rather than a rule for every car; in some places zoning rules prohibit overnight stays, especially in larger cities. The advice is to call or ask in the store first, because only the individual store can agree.

Safety first

Keep the engine off. According to the US health agency CDC, carbon monoxide is odourless, colourless and deadly, and people who are asleep can be affected before symptoms appear. Typical warning signs are headache, dizziness, nausea and confusion. This also applies to heating with the engine running. In snow, the CDC advises checking that the tailpipe is clear before you get in, because a blocked pipe lets carbon monoxide build up inside. In Germany, section 30 of the road traffic regulations (StVO) prohibits unnecessary noise and avoidable exhaust nuisance, which includes letting the engine run without need.

Park level and apply the handbrake. ADAC advises opening the windows a finger's width when weather allows, and locking the doors from inside. If you have been drinking, do not sleep in the driver's seat and keep the key out of the ignition. The body breaks down only about 0.1 per mille per hour, so you may still be unfit to drive in the morning.

Comfort

Fold the rear seats down and fill gaps and edges with boxes or foam; put a mat on top. A pad with a good insulation value often matters more than the sleeping bag, because heat is lost downwards. A sleeping bag with a suitable rating beats a thin blanket, since a car cools quickly. Cut-to-size reflective covers give privacy, dim light and insulate a little.

Condensation comes from breath on cold glass. Cracking two windows on opposite sides helps; window vent guards keep rain out. A headlamp spares the car battery compared with interior lights. If you plan a long sleep, try lying down once beforehand, ideally in the driveway.

Choosing a spot and alternatives

Choose a level, legal place meant for parking: a car park where it is allowed, a rest area or service area, or a campsite. Residential streets are delicate, and remote places are not automatically safer. Move on the next morning and leave nothing behind.

If the rules are unclear, a campsite or motorhome pitch is the safest solution. Toilets, water and permission are sorted, often for little money, and a tent next to the car is then allowed too. When in doubt, ask the municipality, the site operator or the police before you lie down.

Sources

• Car Camping: Schlafen im Auto (ADAC Nordrhein)
• Wildcampen kann teuer werden: Diese Regeln gelten in Österreich und Europa (ÖAMTC)
• Wild campen in der Schweiz (TCS)
• About Carbon Monoxide (CDC)
• Best Practices For Overnighting at Walmart (Outdoorsy)
• Is It Legal To Sleep Overnight At Rest Areas? (Jalopnik)
• § 30 StVO, Umweltschutz (dejure.org)