What can red-white warning plates on vehicles indicate?

You answered correctly. Red-white warning plates on vehicles are used to signal special situations to other road users. They are most commonly found on vehicles that are particularly wide or long, such as those carrying large loads, and on trailers that are parked on the roadway within built-up areas. The purpose is to make these vehicles more visible and to alert you to potential hazards caused by their size or position. However, these plates do not indicate the transport of dangerous goods—different signs and markings are required for those transports. Remember: always stay alert for warning plates, as they require you to pay extra attention and may affect how you pass or park near the vehicle.