is an autobahn in Germany, connecting Dortmund in the west with Hanau in the southwest. It is colloquially known by its byname Sauerlandlinie, which derives from the Sauerland, the landscape which said autobahn is running through between the cities of Hagen and Siegen. Many people think of it as the Queen of autobahns, for no autobahn runs over a greater number of bridges. The highest bridge is the Talbrücke Sichter between Lüdenscheid and Meinerzhagen at 530 metres above mean sea level.
1960s and 1970s a southward extension, then called
„Odenwald-Neckar-Alb-Autobahn“ (ONAA) was proposed
to pass via Groß-Umstadt, Michelstadt, Schwaigern, Neckarwestheim, Mundelsheim, Berglen, Remshalden, Lichtenwald and Schlierbach, linking
the ONAA to the A 8 near Kirchheim unter Teck, however the project was abandoned due to
ecological reasons in 1979 by the state government of Baden-Württemberg.
A 45 branches off the A 2
at the Kreuz Dortmund Nord-West, passes through the eastern
Ruhr area and enters the Sauerland near Hagen.
enters the Siegerland and the state of Hesse, where the
A 45 is joined by the A 66 between the interchanges
and Langenselbolder Dreieck. A short stretch of
road, between junctions Alzenau and Mainhausen, is on Bavarian territory, then the A 45 merges with the
A 3 at the interchange
Seligenstädter Dreieck in the state of Hesse, just to the
west of the Bavarian city of Aschaffenburg.
Numerical listing of Exits and Junctions