• Since the start of the school year, traffic has become very difficult in Rennes with huge traffic jams on the ring road during rush hour.

  • In an attempt to make traffic a little more fluid, several measures have just been unveiled by the authorities.

  • On certain penetrating roads leading to Rennes, buses and coaches will thus be able to use the emergency lanes.

  • Traffic lights will also be installed on certain access ramps to the ring road to stop cars in the event of congestion.

Impossible to escape since the start of the school year. With the resumption of economic activity and the end of compulsory teleworking, Rennes, like all other metropolises, is paralyzed by huge traffic jams during rush hour. In September, the Breton capital also inherited the title of the most congested city in France according to a ranking established by the magazine

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. If the methodology of said classification raises questions, no one can deny that it has been a hassle to get in and out of Rennes since the start of the school year. “Between September 2019 and September 2021, traffic increased by 1% on the ring road,” confirms Frédéric Lechelon, director of the Interdepartmental Directorate of Western Roads.

However, the increase seems small.

But coupled with the increase in the population in the metropolis, it contributes to the congestion of the ring road.

To try to make traffic more fluid, several measures will be implemented by 2024 as part of the traffic management agglomeration master plan (Sdagt) which the metropolis has just adopted.

This plan, funded by the State, Rennes Métropole, the department and the region to the tune of 25 million euros, aims first of all to promote intermodality.

"We must find alternatives to the car by making public transport more competitive," said Matthieu Theurier, vice-president of the metropolis in charge of transport.

Coaches and buses on emergency lanes

This involves in particular the creation of lanes to circulate buses and coaches on the emergency lanes of the penetrating roads leading to Rennes.

Work is already underway on the last kilometers of the RN137 linking Nantes and Rennes with entry into service scheduled for summer 2022. “Buses and coaches should gain five minutes compared to cars”, specifies Frédéric Lechelon.

Three similar tracks will also see the light of day in the medium term on the Lorient-Rennes (RN24), Saint-Malo-Rennes (RD137) and between Betton and Rennes (RD175) axes.

In addition to buses and coaches, carpoolers may also one day be able to travel on the emergency lanes of these axes if the experiment carried out at the end of 2023 on the RN137 is conclusive.

Vehicles stopped at a red light if the ring road is saturated

To regulate access to the bypass, and thus avoid the overflow of motorists, traffic lights will also appear in the coming months on certain ramps as is already the case on the Nantes ring road. If traffic is saturated, incoming vehicles will be stopped by a red light and held for a few moments on the access ramp. "We will release the cars drop by drop, which should save a few minutes in the emergence of traffic jams", assures the director of the DIR West. These traffic lights will be installed in three specific sectors of the ring road: between the gates of Lorient and Saint-Nazaire, at the level of the porte de Bréquigny and between the gates of Beaulieu and Angers.

In parallel, improvements will be carried out on the bypass to create intersecting roads between the gates of Villejean and Beauregard and those of Bréquigny and Nantes.

"Congestion is often created by insertions on the bypass and it is therefore necessary to create a third lane to facilitate entry and exit", underlines Frédéric Lechelon.

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  • Lyon

  • Car

  • Mobility

  • Caps

  • Public transport

  • Circulation

  • Traffic jams

  • Ring road

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