The Autoroute 13, abbreviated to A13, is a motorway in southern Luxembourg.

It is 42.310 kilometres (26.290 mi) long and connects Pétange to Schengen, via all the largest towns in the Red Lands.

At Schengen, it reaches the German border, whereupon it meets the A8, which crosses southern Germany.

For its western 20.4 kilometres, until it reaches Lankelz, it is known as the South collector road (French: Collectrice du Sud).

For its eastern 21.9 kilometres, it is known as the Connection with the Saar (French: Liaison avec la Sarre), or Saar Autobahn (Luxembourgish: Saarautobunn).