Traffic will be prohibited in both directions from 7:30 AM to 11:00 AM, notably on the RD 91 – Route de Satory, between rural path n°7 and the town limit « Guyancourt la Minière », on Rue Louis Blériot, and on Place de la Commune de Paris. However, the RD 91 will remain accessible to local residents.
From 9:30 AM to 3:00 PM, further closures will affect a section of the roundabout between Guyancourt, Montigny-le-Bretonneux, and Voisins-le-Bretonneux, Avenue des Garennes, the Sangliers roundabout, and Avenue du 8 Mai 1945 towards Saint-Cyr-l’École. The Route de Saint-Cyr will also be closed up to the municipal limit with Saint-Cyr-l’École.
Access to the Gymnase des Droits de l’Homme parking, the traveler's welcome area, and the RN12 access ramp will also be closed.
Diversions will be implemented by the organizer, with advance signage informing users of upcoming closures. Motorists are advised to plan their journeys and use alternative routes where possible.
