 The Autobahn network is built in a grid network, with four east–west (A2, A40, A42, A44) and seven north–south (A1, A3, A43, A45, A52, A57, A59) routes.The A1, A2 and A3 are mostly used by through traffic, while the other autobahns have a more regional function.Both the A44 and the A52 have several missing links, in various stages of planning.