There's a few changes taking place on the Pacific Motorway as part of measures to reopen the border between New South Wales and Queensland tomorrow, December 1.

So, if you are heading north from Lismore, be aware of the changed traffic conditions at the Tugun Bypass Tunnel tomorrow evening.

All northbound lanes of the tunnel will be closed from 8pm tomorrow, Tuesday 1 December to 6am  Wednesday 2 December, weather permitting. One southbound lane will also be closed while routine maintenance work is carried out.

Northbound traffic will be diverted onto the Gold Coast Highway and Stewart Road during the closure. There is no diversion for southbound traffic.

The tunnel will open to all traffic by 6am Wednesday 2 December.

Motorists are advised to allow up to 10 minutes additional travel time, to drive to the conditions and follow the directions of signs and traffic control.

Transport for NSW thanks motorists for their patience while this essential work to reunite border communities is carried out.

For the latest traffic updates download the Live Traffic NSW App, visit livetraffic.com or call 132 701.