A new controversial motorway in the south of France finally looks set to be free of environmental legal challenges after France’s highest administrative court upheld a ruling allowing construction to continue.
The A69 motorway between Toulouse and Castres should now see its construction complete in October 2026.
Since the start of construction in 2023, the A69 has faced several challenges from locals and environmental activists.
Those in favour of the road argue that it will bring economic benefits to the area, improving travel times between the two cities that are currently only linked through a smaller national road.
However, environmental activists believe that the new motorway would lead to habitat loss and raze important wooded areas, which they deemed unnecessary considering a road is already linking the cities.
In turn, they requested the annulation of environmental permits for the road’s construction, leading to a lengthy legal wrangle.
“The environmental authorisations for the A69 motorway project are now final,” said the Council of State in its ruling.
A map of the route can be seen below, showing major interchanges.
Following years of demonstrations and clashes at the site, protestors won a major battle in February 2025 when a local court ruled that the road’s construction was not sufficiently in the public interest and annulled two environmental permits.
In December 2025, the Toulouse appeals court overturned the initial ban, reinstating the original permits.
The Conseil d’Etat (Council of State, France’s supreme administrative court and legal advisor to the government) has upheld the Toulouse court’s decision, following the advice of the public rapporteur.
The rapporteur argued that the protesting groups’ claim – that the road’s cancellation was an ‘imperative reason of overriding public interest’ due to environmental reasons – was not sufficient.
The road is indeed in the public interest because it will "reduce travel time between Castres and Toulouse, improve the living environment for local residents, enhance road safety, and contribute to the development of the Castres urban area,” said the rapporteur.
The ruling was met with disappointment by local groups, including ‘La Voie est Libre’, an environmental group at the centre of the legal battle.
“Environmental law has just been buried under a morbid legal precedent. This amounts to a blank cheque for ramming projects through - a red carpet for industrial interests determined to indefinitely exploit the land for their own gain,” it said in a statement following the ruling.
“In the very week we are feeling the lethal temperatures of the climate crisis like never before, the Council of State has sent the worst possible signal; it proved incapable of upholding the law in the face of pressure from the A69’s political-financial lobby.”
Is the saga over?
There will be no more legal challenges on the matter of environmental damage and public interest of the road, as the Council of State’s ruling is final and cannot be appealed.
However, protest groups are reportedly planning to lodge another legal complaint against route constructor Atosca, for exceeding allotted land allowances from construction permits.
Protestors claim that Atosca occupied 90 hectares of land illegally (as it was not included in the approval of the project nor subsequent permits) and carried out work on this land.
While this new legal challenge is in theory possible, the road is set to be completed before it can come to fruition, and even if initially successful, the project is unlikely to be halted.
French law generally allows for work or current conditions to continue during an appeals process, without penalties being immediately imposed.
In the case of the A69, this meant construction work continuing during the appeal process, as the permits were not definitively revoked despite the February 2025 ruling.
In criminal cases, it means penalties are not immediately applied until an appeal case is held, unless prosecutors argue for ‘provisional execution’ and these are immediate.
