Bundesautobahn 4 is an autobahn in two discontinuous segments that crosses Germany in a west–east direction. The western segment has a length of 156 km (97 mi), while the part in the east is 429 km (267 mi) long.

Bundesautobahn 7 is the longest German Autobahn and the longest national motorway in Europe at 963 km. It bisects the country almost evenly between east and west. In the north, it starts at the border with Denmark as an extension of the Danish part of E45. In the south, the autobahn ends at the Austrian border. This final gap was closed in September 2009.