Transport for NSW advises motorists of changed overnight traffic conditions from this weekend on the Pacific Motorway at the St Helena Tunnel to carry out essential maintenance work.

 To reduce impacts to motorists, the northbound and southbound lanes of the tunnel will be closed overnight on Sunday 16 and Monday 17 May from 7pm to 5am, weather permitting. Northbound and southbound traffic will be diverted onto the Hinterland Way between the Byron Road interchange at Bangalow and the Ewingsdale Road interchange at Ewingsdale.

Motorists are advised to allow up to 10 minutes additional travel time for the diversions, drive to the conditions and follow the direction of signs and traffic control. Routine maintenance of the St Helena Tunnel is carried out every three months and involves a range of measures such as inspecting the various operating and safety systems.

 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.