Transport for NSW is carrying out night work on Toukley Bridge for the next five weeks, starting on Monday, November 16.
The work will finalise pier and girder repairs and maintenance below the deck, as well as bridge joint and general maintenance at road level.
Most of the work will be done using scaffolding beneath the bridge, with one lane closed to provide access.
Signs and marker buoys are placed in the channel around the work area to alert boaters.
Work will be done between 6pm and 4am from Mondays to Thursdays, weather permitting, and there will be a 40km/h speed limit during work hours.