Regulatory Signs

Understanding the Abnormal Vehicles Prohibited Sign

Abnormal Vehicles Prohibited

Where: This sign is displayed on any public road, lane, path, or designated area where abnormal vehicles are not permitted to enter or travel. It is typically found at the entrance to bridges, tunnels, or narrow roadways where oversized vehicles cannot safely pass; on urban streets, residential areas, or city centres not designed for heavy or wide loads; along routes with height, width, or weight restrictions; and in environmentally sensitive zones or restricted transport corridors where large vehicle movement is limited.

Purpose: The purpose of this sign is to prohibit abnormal vehicles — vehicles that exceed the legal limits for mass, height, width, or length — from proceeding beyond the point where the sign is displayed. This restriction is enforced to protect public infrastructure, such as bridges, pavements, and tunnels, from potential damage caused by oversized loads, ensure the safety of other road users by preventing congestion or collisions caused by large or slow-moving vehicles, maintain smooth traffic flow in areas unsuitable for abnormal loads, and direct heavy or abnormal traffic to approved and specially designated abnormal load routes.

Action Required by Driver: If you are driving or transporting an abnormal vehicle or load, do not proceed beyond this sign. Follow the approved abnormal load route as indicated by your route permit or transport authority, and ensure you have the necessary permits and escort arrangements before operating on public roads. Ignoring this restriction may result in severe penalties, vehicle impoundment, or damage to infrastructure.

Abnormal vehicles prohibited sign