The Northbridge Tunnel, also known as the Graham Farmer Freeway Tunnel, is the only location in Western Australia where placarded vehicles are not allowed. Under the Dangerous Goods Safety (Road and Rail Transport of Non-explosives) Regulations 2007 (the Regulations), drivers of placarded vehicles entering the tunnel will incur penalties. This ensures that there is minimal risk to
other people travelling in the tunnel.
Tunnels are enclosed spaces and are often very busy, especially during peak periods, with limited exits and access points. This makes it very difficult for people to escape or receive help from emergency response teams if a serious incident (such as an explosion or toxic gas release) occurs. It is therefore important to plan your route to prevent accidentally entering the tunnel.