A1 freeway closures: SNCF work from July 15 to August 1, what you need to know

Please note that the A1 freeway will be closed for eight nights between July 15 and August 1 to allow the installation of a railway structure. This work, linked to the future Roissy-Picardie line, will impact traffic between Survilliers and the A1/N104 interchange. Here's an update so you don't get stuck.

Since Tuesday, July 15, theA1 freeway, the key route between Paris and Lille, has been subject to night-time closures on a section north of Roissy. The aim is to allow the SNCF to build a railway structure over the motorway, as part of the Roissy-Picardie link project. The result: eight nights of disruption scheduled until August 1.

Which stretches of road are affected, and at what times?

The closures are spread over three distinct periods, with specific times depending on the direction of traffic.

Nights from July 15 to 17
- To Paris: closed from 9pm to 5am
- To Lille: closed from 9pm to 6am
Nights from July 28 to 30
- To Lille only: closed from 9pm to 6am
Nights from July 30 to August 1
- To Paris only: closed from 9pm to 5am

The section affected is between the Survilliers n°7 interchange and theA1/N104 interchange. Detour routes are set up every night to assist drivers.

Why these closures on the A1 freeway?

These night-time interruptions are intended to ensure the safety of workers during the installation of a railway bridge deck. This structure will enable the future Roissy-Picardie link, currently under construction, to cross the A1. This structuring project will link the north-east of Val-d'Oise to Roissy-Charles-de-Gaulle station via a high-speed TER line.

How can you plan your journey to Roissy or Lille?

If you need to reach Roissy-CDG airport, allow a safety margin of at least 30 minutes on the nights concerned. Remember to :

Consult traffic information in real time on Sytadin.fr
Use the Sanef & Vous application
Listen to Radio Autoroutes 107.7 FM during your journeys
Contact Sanef customer service on 09 708 08 709 if you have any questions

How long will the disruption last?

The last night of closure is scheduled from July 31 to August 1. From the morning of August 1, traffic should resume as normal on the A1. However, other works linked to the Roissy-Picardie line will continue in the area.

In short, if you're driving at night between Paris and Lille until August 1, watch out for temporary closures on the A1 between Survilliers and the N104. Deviations, variable timetables and patience are essential, especially if you're going on vacation or need to catch a plane.