Which vehicles must keep the minimum distance of 70 m here?

The sign indicates that certain vehicles must maintain a minimum distance of 70 meters from each other. According to German traffic regulations, this requirement applies specifically to trucks with a permissible total mass exceeding 3.5 tons and truck tractors.

The reasoning behind this regulation is primarily safety. Maintaining a greater distance between heavier and larger vehicles helps prevent accidents, allows for better reaction times, and ensures a smoother flow of traffic. Cars are generally not required to adhere to this distance, as they pose a different level of risk in terms of size and stability.

It's crucial for drivers of the specified vehicles to comply with this rule to contribute to overall road safety and reduce the likelihood of collisions, especially in heavy traffic conditions.