Emergency services are at the scene of a car fire on the Pacific Highway at Bonville.
They were called to the scene just after 9:30am.
Traffic is affected northbound approaching Lyons Road at the Williams Road Overpass. One lane is currently closed with queues of more than 3km.
Triple M listener Gavin arrived at the scene just as the flames began to engulf the vehicle. He told Whitey that it was a little chaotic at first.
"The vehicles were backing up very quickly. The Police and Firies have arrived, but the traffic is banked up for kilometres", he said.
Northbound traffic is at a standstill past Archville Station Road and building.
Motorists can expect delay, and are asked to take extra care in the area.
"Some vehicles are basically doing U-turns to head south as well, so you have be careful in both directions", he said.