What is the maximum speed you are allowed to drive a truck with a permissible total mass of 4.0 t on autobahns?

In Germany, the maximum speed limit for trucks with a permissible total mass of 4.0 tons on autobahns is set at 80 km/h. This regulation is outlined in the German Road Traffic Regulations (StVO). The speed limit is established to ensure safety on the roads, as heavier vehicles typically require more time to stop and can be less maneuverable than lighter vehicles. Maintaining a lower speed helps promote safer driving conditions for all road users, including cars and motorcycles. Understanding and adhering to these rules is crucial for the efficient and safe operation of all vehicles on the autobahn.