The German summer holiday traffic regulations apply to which vehicles used in the transport of goods for hire or reward?

The selected combination of trucks with a gross vehicle weight rating in excess of 7.5 tons and trucks with a trailer is correct because these vehicles are subject to specific summer holiday traffic regulations in Germany due to their potential impact on road congestion and safety. These regulations are in place to mitigate the increased traffic volume during peak holiday seasons, focusing on larger vehicles that contribute more significantly to road wear and can obstruct traffic flow if not properly managed.

Tractors are typically not included in the same category under these regulations, as they serve different purposes and are often used on agricultural land rather than for transporting goods for hire. Understanding the distinction is crucial for compliance with traffic rules and ensuring road safety during busy periods.