The sign you mentioned, Motorway hotel, indicates a hotel or accommodations available near the motorway. This sign is typically blue with a white hotel symbol. It is used to help drivers identify lodging options when they are traveling long distances on the motorway.

According to German traffic regulations, this sign informs you that you can find a hotel or a place to stay in the vicinity, which can be useful for planning breaks during long journeys. It signifies that the facilities are designed to accommodate travelers, often providing amenities such as food and rest areas.

If you have any further questions about traffic rules or other signs, feel free to ask!