You are driving a vehicle combination. It consists of a motor vehicle with a permissible maximum mass of up to 3.5 tonnes and a trailer that is authorised for speeds of up to 100 km/h. What is the maximum speed limit on a federal highway (not an expressway)?

When driving a vehicle combination with a motor vehicle up to 3.5 tonnes and a trailer approved for speeds up to 100 km/h, the maximum allowed speed on a federal highway (not an expressway) is 80 km/h. This rule is set because trailers, even if approved for higher speeds, require lower speed limits for safety reasons to ensure stability and control, especially on roads without expressway standards. The 80 km/h limit ensures safe handling of the combination in typical highway traffic conditions, preventing accidents due to trailer sway or insufficient braking distance. Remember, even if the trailer is authorized for 100 km/h, the law restricts speed to 80 km/h in this situation on regular federal highways.