The sign "Prohibition for motor buses" indicates that motor buses are not allowed to enter a specific area or road. This regulation is typically placed in zones where bus traffic may pose safety risks, lead to congestion, or where alternative routes for buses are available.

Drivers of motor buses must look for alternative routes when they see this sign, as entering the prohibited area could lead to fines or penalties. It's important for all drivers to be aware of such restrictions to ensure compliance with traffic regulations and maintain safety on the roads. If you have any further questions or need clarification on related topics, feel free to ask!