federal highways. The main distinguishing characteristic between German Bundesstraßen
and the world-famous Autobahnen
(motorways) is that there is a general 100 km/h (62 mph) speed limit on federal highways, as opposed to the "recommended" limit of 130 km/h (83 mph) in unmarked sections of the motorways. Once the federal highway is a dual carriageway
, the "recommended" speed limit is again 130 km/h (83 mph). The same applies when the Bundesstraße has only single lanes, but both lanes are physically separated by a central reservation
. Many sections of the federal highways have only two, undivided lanes with no hard shoulder
German federal highways are labelled with rectangular yellow signs with black numerals, as opposed to the motorways' white-on-blue markers.