You are driving an agricultural tractor with a maximum design speed of 40 km/h. You are permitted to tow what maximum number of trailers that have a maximum permissible speed of 25 km/h?

According to German traffic regulations, an agricultural tractor with a maximum design speed of 40 km/h is allowed to tow up to two trailers if those trailers have a maximum permissible speed of 25 km/h. This rule ensures safety by limiting the number of trailers on the road, considering the tractor's speed and braking capability. Towing more than two trailers would affect maneuverability and braking distance, increasing the risk of accidents. Therefore, the maximum allowed is two trailers under these conditions.