ONE lane has re-opened after a burning bus has closed southbound lanes of the M1 Motorway on Wednesday morning.
The highway was shut approaching Reeves Street in Somersby.
At 11am one of two southbound lanes had re-opened, with the other shut as salvage continued.
Traffic was queued more than four kilometres from the bottleneck.
Motorists are warned to avoid the area and exit the motorway at Peats Ridge Road.