What do Load and Dimension Restriction Signs indicate?

Load and Dimension Restriction Signs are crucial for maintaining the safety and integrity of road infrastructure. These signs specifically indicate prohibitions on the weight and size of vehicles that are allowed to pass through a specific area. They serve to prevent vehicles that exceed the specified weight or size limits from using certain roads, bridges, or tunnels that may not be designed to support heavy or oversized loads. This helps to prevent structural damage to the roadways and ensures the safety of all road users.

Understanding this is vital for drivers, especially those operating large vehicles such as trucks and buses. By adhering to these restrictions, drivers can avoid penalties, improve safety, and protect infrastructure. The other options relate to different aspects of road use, such as speed regulation, directional guidance, and traffic signal warnings, which do not pertain to load and dimension restrictions. Thus, the focus of the correct answer is directly aligned with the intent and purpose of Load and Dimension Restriction Signs.