Road traffic looks difficult in August 2025 in the Ile -de -France region. The Ile-de-France Road Directorate (DIA) intends to take advantage of this hollow period to carry out a series of work. Consequence? Significant projects are announced in Île-de-France, leading to the closure of several main axes, as on the A6A or the national road 406. We take stock.
If some Ile -de -France residents love the summer in Paris, others fear this period, often synonymous with work. In addition to work in public transportof the renovation work are also expected on Ile -de -France roads and highways. This is what the Directorate of the Île-de-France roads (Innumerable).
So beware, dear motorists, traffic promises to be difficult in this August 2025 in Île-de-France. Thus, a series of several sites will lead Closure of several main axesas on the A6A or the national road 406.
As indicated by Innumerable In a press release, the summer period “allows work to be carried out more efficiently: weather conditions are more favorable and traffic is lowest at the heart of summer compared to the rest of the year“. In June, July and August, it is possible”to reduce the number of open traffic lanes, or even close an axis continuously, with much fewer significant impacts on travel times“, Specifies the direction of the roads of Île-de-France, which indicates investing”Almost 200 million euros each year to maintain its network, which has almost 1,100 km of highways and national roads, 25 tunnels and 1,950 art structures (bridges, viaducts, retaining walls, etc.).“
Consequences ? The closures and works are multiplying during the summer. So we will have to be patient and find Alternatives to circulate in Île-de-France In August, because several major axes will be completely closed.
This is the case on the RN104. In detail, renovation work on roads will require 24-hour closings from the RN104 on a 14 km linear, between Pontault-Combault and Évry-Grégy-sur-Yerres (77). Thus, the N104 is closed, inside (A4 to A6), From Monday August 4 to 9 p.m. Thursday August 14, 2025 at 1:00 p.m. Then, From Monday August 18 at 9:00 p.m. to Thursday August 28, 2025 At 10 p.m. N104 is closed outside (A6 to A4).
A closure of the RN406on the section between Boissy-Saint-Léger and Créteil, is also announced. So, From Monday August 4 to 6 a.m. to Friday August 8, 2025 at 6 a.m.the RN406 will be closed in the province> Paris (connecting Boissy-Saint-Léger to Créteil). Then, From Monday August 18 to 6 a.m. to Thursday August 21, 2025 at 6 a.m.this same RN406 will be closed, this time in the direction of Paris> Province (connecting Créteil to Boissy-Saint-Léger).
On the side of RN14“Safety work on the roadway“Craft 24 hours a day by this national road. It is closed until Friday August 22 2025 at 5.30 p.m., in both directions of traffic, at the town of Puiseux-Pontoise (95) on a linear of approximately 1.5 km.
Another axis, another site. Since July 17, Until September 4 next, traffic is done on a path on a part of L’A6b. Thus, as the Sytadin site indicates, the slow path of the A6B, in the Paris-Province sense (Italian tunnel), “is neutralized from the peripheral boulevard to the bicêtre tunnel“. As for the access ramp to the A6B, in the direction of Paris-Province from the D126B departmental road, it is closed throughout the duration of the work.
Another disruption to be expected in August 2025 on Ile -de -France roads? Due to rehabilitation of the large N118/A86 viaduct in Vélizy-Villacoublay (78), the N118 rampin the Paris-Province sense towards the A86 Direction Créteil, is entirely closed Until Friday August 8 2025 at 5:30 am.
And summer work does not stop there on the Ile -de -France roads. The renovation of the road to the Rn12 will train “a tangible switch” From Monday August 4 to 9:00 p.m. to Thursday August 28, 2025 at 5:00 a.m. At the Guyancourt level (78). Traffic will be done on a single route for each direction in the work zone.
Traffic restrictions are also to be expected on A6A In the province towards Paris. Until Thursday, August 14, 2025“The renovation work of roads, sanitation and resumption of the reservoir on A6A is done on a linear of 200 m in the province-Paris direction“. Then, From Thursday August 14 to Monday September 8, 2025repair work on the Arcueil viaduct requires 24 -hour track reductions. “”Traffic will be on one way in the province-Paris direction and two ways in the Paris-Province sense“Indicates the DIREF.
Also, remember to study your course upstream and consult the alternative routes offered on the application or the site of Sytadin.
