Motorists are advised of changed traffic conditions next week on Viaduct Road in South Grafton as part of work for the new Grafton bridge project.

Viaduct Road will be closed between 7am on Monday 20 April and 7am on Wednesday 22 April for asphalting to be carried out for the new roundabout at the intersection of the Gwydir and Pacific highways.

A detour will be available via Charles Street (Gwydir Highway) while Viaduct Road is closed.

Motorists are advised to drive to the conditions and follow the directions of signs and traffic control.

Transport for NSW thanks motorists for their patience during this time.

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