A3 motorway (Luxembourg)

Autoroute 3
Autobunn 3
Autoroute de Dudelange
Route information
Part of E25
Length	13.318 km (8.275 mi)
Existed	1978–present
History	Completed 21 June 1995
Major junctions
North end	Hesperange for Luxembourg City
Major intersections	Croix de Gasperich Bettembourg Dudelange
South end	Autoroute 31 for Metz
Location
Country	Luxembourg
Highway system
Motorways in Luxembourg

The Autoroute 3, abbreviated to A3 or otherwise known as the Dudelange motorway (Luxembourgish: Diddelenger Autobunn, French: Autoroute de Dudelange), is a motorway in southern Luxembourg. It is 13.318 kilometres (8.275 mi) long and connects Luxembourg City to Dudelange. At Dudelange, it reaches the French border, whereupon it meets the A31, which leads to Metz.