G20 – Mandatory direction for vehicles carrying dangerous goods

Road sign G20 is a mandatory regulatory sign indicating the required direction of movement for vehicles transporting dangerous goods It is used to guide specialized vehicles carrying explosive flammable toxic or other hazardous substances along safe and predefined routes
After the sign is placed vehicles carrying such materials are prohibited from moving in any other direction The purpose is to prevent risky situations accidents or environmental damage by restricting movement through populated areas tunnels bridges or zones with high human presence
Visually the sign is circular with a blue background and a white arrow indicating the mandatory direction of travel In some cases an additional plate may be placed below to specify the exact direction or vehicle type
The standard dimensions of the G20 sign are
600 mm for use within populated areas
900 mm for use outside populated areas and on high-speed roads
It is placed at intersections junctions or specific sections of the road network where the movement of dangerous goods vehicles must follow a designated direction
The main purpose of the G20 sign is to ensure road safety and environmental protection by clearly regulating the routes of vehicles transporting hazardous materials