Severe disruption on A7 motorway in May - what alternative routes are available
The northbound (Marseille–Lyon/Paris direction) to be closed for four weekends
Major traffic congestion expected to occur during roadworks
2025 K-FK/Shutterstock.
Major disruption is expected throughout May as roadworks take place on the northbound carriageway of the A7 motorway, between the Pierre-Bénite (A450/A7) and Saint-Fons interchanges, south of Lyon.
The works, which form part of a large-scale renovation of two viaducts at Pierre-Bénite, will require the complete closure of this section of the motorway over four extended weekends.
The A7 is one of France’s busiest routes, carrying around 150,000 vehicles a day, meaning significant congestion is likely as drivers divert to alternative routes.
A similar operation took place last year on the southbound carriageway. However, unlike in 2025, when partial closures allowed some traffic to pass, this year a full closure will be enforced, requiring all vehicles to use diversion routes.
When will the closures take place?
The closures are scheduled across four periods:
7–11 May
13–18 May
22–26 May
29 May–1 June
Work will begin at 9pm on the first day of each period and is expected to conclude early in the morning on the final day. However, these dates remain subject to change.
Roadworks will involve waterproofing and resurfacing the viaducts, as well as replacing expansion joints.
What alternative routes are available?
During the closures, the Direction Interdépartementale des Routes - Interdepartmental Directorate of Roads (DIR) Centre-East, is advising drivers to follow designated diversion routes:
via the A46 eastern bypass, the northern ring road and the D383
or via the A46, A42 and D383
Motorists are urged to allow extra time for their journeys and expect heavy congestion, particularly during peak travel periods.
Additional closures may worsen disruption
The situation could become even more challenging, as further road closures are under consideration during the same periods. These include sections of the M6 and M7 between the Valvert interchange and junction 1 of the M7.
There are also plans for maintenance work that could possibly result in the closure of the Fourvière tunnel in both directions, a key route through Lyon. If confirmed, this would significantly increase disruption for both commuters and tourists.
