Rødby in the context of Lolland

Bundesautobahn 1 (translates from German as Federal Motorway 1, short form Autobahn 1, abbreviated as BAB 1 or A 1) is an autobahn in Germany. It runs from Heiligenhafen in Schleswig-Holstein to Saarbrücken, a distance of 749 km (465 mi), but is incomplete between Cologne and Trier. B 207 continues north from Heiligenhafen to Puttgarden, at the end of the island of Fehmarn, with a ferry to Rødby, Denmark.

The part north of Hamburg is part of the Vogelfluglinie (Migratory Birds Line) and may be one day connected via a fixed link to Denmark (see below). The term Hansalinie (Hansa line) refers to the part from Lübeck (north of Hamburg, thus overlapping the Vogelfluglinie) south to the Ruhr Area (near Dortmund).

Puttgarden is a ferry harbour and a village on the German island of Fehmarn. It lies on an important route between Germany and Denmark known as the Vogelfluglinie which crosses the 18 kilometres (11 mi) strait, the Fehmarnbelt, to Rødby on the island of Lolland.

Fehmarn Belt (German pronunciation) (Danish: Femern Bælt, former spelling Femer Bælt; Low German: Femernbelt) is a strait connecting the Bay of Kiel and the Bay of Mecklenburg in the western part of the Baltic Sea between the German island of Fehmarn and the Danish island of Lolland. Ferries operated by Scandlines connect Puttgarden and Rødby on the two islands.

The strait features an 18-kilometre-wide (11 mi) wide area with depths of 20–30 metres (66–98 ft). Currents in the strait are weak and mostly dependent on wind.