A3 autoroute

Controlled-access highway from Paris to the A1 near Le Bourget Airport

The A3 Autoroute is a French autoroute located entirely within the department of Seine-Saint-Denis, serving Montreuil, Rosny-sous-Bois, and Bondy. Its southern terminus is an interchange with the Boulevard Périphérique at the Porte de Bagnolet, and its northern terminus is an interchange with the A1 near Aéroport CDG. The A3 is 18 km long, and forms a part of European Route E15. A brief segment of its length is a concurrency with the A86. The first section of the roadway opened in 1969 between the Porte de Bagnolet and Bondy. Following the closure of the A186, one spur route branches off from the A3 - the A103 Autoroute.

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