How fast can you drive on the Autobahn?
Speed limits in Germany
Legally, however, state and even local authorities have the power to enact speed limits. The district of Köln / (Cologne) has posted a speed limit on the heavily frequented Kölner Autobahnring / (Cologne Beltway). Effective 9 April 2008, the City-State of Bremen began enforcing a general 120km/h (75mph) speed limit, citing environmental concerns.  However, Bremen's new limit only impacted an additional 11kilometers of Bremen's 60kilometers of Autobahn;[17]  most Bremen motorways already had some speed restriction due to congestion and noise.[18]