Which motor vehicles may freely choose their lane inside built-up areas?

In German traffic rules, inside built-up areas (urban zones), motor vehicles weighing up to 3.5 tons (including passenger cars, small vans, and motorcycles) are allowed to freely choose their lane when multiple lanes are available in the same direction. This means they are not restricted to a particular lane by law and can use any lane that suits their intended direction or traffic flow, as long as it is safe.

Heavier vehicles over 3.5 tons, like large trucks or buses, often have additional restrictions and may be required to keep to the right or use designated lanes. This rule helps improve traffic flow and safety by allowing lighter vehicles more flexibility in lane choice within city areas.