The sign "Prohibition for vehicles with water-polluting cargo" indicates that vehicles carrying materials that may pollute water bodies are not allowed to enter or travel in that area. This sign is important for protecting the environment, particularly water resources, from contamination. It is typically found near bodies of water, such as rivers or lakes, or in areas where the risk of water pollution is significant.

Drivers should be aware of this sign and ensure that they do not operate vehicles that are loaded with substances that can harm aquatic environments in these restricted areas. Violating this regulation can lead to fines and environmental damage.