The A3 is a short autoroute in France. It links the Boulevard Périphérique ring road around Paris with the A1 autoroute. It is long. It also goes through the communes of Montreuil-sous-Bois, Rosny-sous-Bois, and Bondy to the east of Paris. Part of the autoroute is shared with the A86. The autoroute is also part of the European route E15. As it connects to the A1, it also links Central Paris with Charles de Gaulle airport.