Update, 6.20pm: A further accident, involving five, vehicles has closed traffic on Bent Street, Grafton at the Clarence River Bridge.
The accident took place at about 5.40pm Monday.
Motorists are advised to take the Ulmarra Ferry instead.
The Pacific Highway has reopened at Maclean after an earlier truck and car accident.
The highway had been closed in both directions just south of Farlows Lane.
All lanes are now open and traffic is returning to normal in the area.
Original report: Motorists have been advised to allow extra time following the closure of both lanes of the Pacific Highway today around 1pm.
The closure follows a truck and car accident, south of Farlows Lane, near Maclean.
As of 2pm, emergency services are still at the scene, and diversions are now available for heavy and light vehicles.
Light vehicles are diverting via Yamba Road through the township of Maclean before rejoining the highway.
This diversion is not suitable for heavy vehicles which are diverting via Summerland Way and the Bruxner Highway.
Emergency services remain at the accident scene.
For the latest traffic information visit www.livetraffic.com or call 132 701.