First, get safe
If the car still moves, leave the road before stopping: a car park, a petrol station, a quiet street, the next junction. On a dual carriageway, the hard shoulder is the last resort. Then:
- hazard lights on;
- hi-vis vest on before you step out: it's compulsory in France, and not wearing it can cost a €135 fine;
- all passengers out, waiting behind the safety barrier where there is one, never between the car and the traffic;
- the triangle: only for a car left partly on the carriageway, and only if setting it out carries no risk; on the hard shoulder, leave it in the boot.
Who to call
- 112, the European emergency number, for an injury, smoke, a fuel smell or a car stuck in a live lane.
- The hire company, if the car is hired: its contract usually decides who comes.
- Your breakdown cover, if your insurer or a motoring club at home covers you in France.
- Us, for everything else in Ille-et-Vilaine: the line is answered in French, the forms on this site in English.
The Rennes ring road
The rocade is the RN136: a 31 km ring around Rennes with 17 numbered junctions, the portes, run by the State through the DIR Ouest. It is limited to 90 km/h all the way round, and on its busiest section the DIR Ouest counts some 110,000 vehicles a day, with frequent jams at the morning and evening peaks.
If the car is faltering, don't stop on the ring road: the junctions are close together, so take the next one and stop off the road. If you have to stop, follow the safety steps above, and dial 112 if your car blocks a lane. To be found, two things are enough: the last porte you passed (its number or name, on the signs) and your direction. The inner carriageway runs clockwise, so the numbers go up (after porte 7 comes porte 8, after 17 comes 1); on the outer carriageway they go down.
-
Porte de la Rigourdière
Town: Cesson-Sévigné.
-
Porte de la Valette
Town: Cesson-Sévigné.
-
Porte de Beaulieu
Towns: Cesson-Sévigné, Chantepie.
-
Porte des Loges
Towns: Chantepie, Rennes.
-
Porte d'Angers D173
To Angers. Town: Rennes.
-
Porte de Nantes N137
To Nantes. Towns: Rennes, Noyal-Châtillon-sur-Seiche.
-
Porte de Bréquigny
Towns: Rennes, Noyal-Châtillon-sur-Seiche.
-
Porte de Saint-Nazaire D177
To Redon. Town: Saint-Jacques-de-la-Lande.
-
Porte de Cleunay
Town: Rennes.
-
Porte de Lorient N24
To Lorient, Vannes. Town: Rennes.
-
Porte de Villejean
Town: Rennes.
-
Porte de Brest N12
To Saint-Brieuc, Brest. Town: Rennes.
-
Porte de Saint-Malo D137
To Saint-Malo. Towns: Saint-Grégoire, Rennes.
-
Porte de Maurepas
Towns: Saint-Grégoire, Rennes.
-
Porte des Longs Champs
Towns: Cesson-Sévigné, Rennes.
-
Porte de Normandie A84
To Fougères, Caen. Town: Cesson-Sévigné.
-
Porte de Tizé
Town: Thorigné-Fouillard.
Motorway or expressway?
The roads leaving the ring road don't all follow the same rules:
- the A84 (porte de Normandie, towards Fougères and Caen) is a motorway: only approved recovery operators may come out. Get behind the barrier and dial 112;
- the D137 to Saint-Malo was given expressway status by a 1991 decree; it's a free dual carriageway of about 66 km;
- on the RN137 south of Rennes, a reserved lane has run on the hard shoulder since 2023 between Chartres-de-Bretagne and the porte d'Alma, and it keeps its emergency role: a broken-down vehicle may stop there.
Neither the A84 nor the D137 has toll booths. In every case, the safety steps stay the same, and we can arrange the tow once the car has left the fast road.
Saint-Malo and the ferries
Saint-Malo is the end of the D137 from Rennes, which carries close to 46,000 vehicles a day on the approach to the town, according to the Department. Heading for the boat from Rennes, note that only one rest area is left on the way, at Montmuran: stop there if the car is giving warning signs, rather than on the hard shoulder.
- At the ferry terminal du Naye, in the boarding lanes or on the car deck, speak to the port or ship's staff first: those areas are restricted. Once you're outside them, tell us whether you are still in the queue.
- In town, give the district: Intra-Muros, Saint-Servan, Paramé, Rothéneuf, or the name of the nearest shopping centre.
- In a multi-storey car park, give the height limit shown at the entrance.
Across the Rance, Dinard is reached on the D168 over the Rance tidal dam. Lifting bridges open there to let boats through, at times set by the tide, so a wait can be added to the tow truck's journey; if the car stops on the dam itself, treat it like a fast road.
Roscoff, the other Brittany Ferries port, is in Finistère, at the far west of Brittany and outside the area we cover. Coming east from there towards Rennes, you reach Ille-et-Vilaine on the N12 from Saint-Brieuc: from then on, we can help.
Mont-Saint-Michel
The Mont and its visitor car parks are just over the border, in Normandy (Manche), outside Ille-et-Vilaine and so outside our area: for a breakdown there, call your hire company or your breakdown cover. On the Breton side, the roads towards the bay pass through towns we cover, such as Pleine-Fougères, Dol-de-Bretagne and Cancale, and Saint-Malo's planning documents note heavy traffic at tourist peaks: any arrival time we give allows for it.
Hire cars and airports
Collected your hire car at Rennes station or at Rennes-Bretagne airport? The airport sits in Saint-Jacques-de-la-Lande, on the D177 towards Redon, from porte 8 (porte de Saint-Nazaire). On the Emerald Coast, the airport nearest Dinard is in the neighbouring town of Pleurtuit. In all cases, ring the hire company's assistance line first, and at an airport car park say exactly where the car is: level, row, and whether a height limit applies.
After a minor collision
If anyone is hurt, 112 first. Otherwise, French drivers fill in a constat amiable, the European accident report: the layout is identical whatever the language of the form, so you can compare it box by box with an English copy. Both drivers sign the same sheet and each keeps a copy. Only sign what you understand and agree with; the observations box is there for your own remarks. Then inform your insurer or the hire company, as their contract requires.
If the car has gone to the pound
Outside Paris, Lyon, Marseille and Toulouse, the pound (fourrière) cannot charge more than €135 to take a car away, plus €7.15 for each day it keeps it; those ceilings date from 1 October 2026. Start by obtaining the release order (mainlevée); at the pound, pay and show the car's insurance papers, your licence and its registration certificate.
Useful sentences in French
- Je suis sur la rocade, après la porte 8, sens intérieur. I'm on the ring road, past junction 8, on the inner carriageway.
- Je suis au terminal ferry, dans la file d'embarquement. I'm at the ferry terminal, in the boarding lane.
- La voiture ne veut plus démarrer. The car won't start any more.
- J'ai crevé, je n'ai pas de roue de secours. I've had a puncture and have no spare wheel.
- C'est une voiture louée. It's a hired car.
- Rappelez-moi, s'il vous plaît. Please call me back.
Sources (in French)
- Safety vest, triangle and fines: service-public.gouv.fr.
- Pound charges since 1 October 2026: service-public.gouv.fr.
- Ring road traffic and closures: DIR Ouest and Bison Futé.
Updated November 2026.