A12 autoroute

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A12 autoroute
Route information
Length	8.5 km (5.3 mi)
Existed	1950–present
Major junctions
South end	N 10 near Trappes
Major intersections	N 12 near Bois-d'Arcy
North end	A 13 near Bailly
Location
Country	France
Highway system
Roads in France Autoroutes Routes nationales

Autoroute A12, is a French autoroute located in Yvelines, near Paris. It branches off from A13 (also known as the Motorway of Normandy) at an exchange known as the Triangle de Rocquencourt located in the town of Bailly and merges with RN12 and RN10 at Bois-d'Arcy. Its total length is 8.5 km (5.3 mi). Access is free.

It has not been lengthened since its construction, which makes it the oldest French motorway to have remained on its original route.