From Monday 26 to Thursday 29 February, between 8pm and 4am, Moss Vale Road will be closed in both directions from Barfield Road to Kangaroo Valley Road, weather permitting.
Heavy vehicles longer than 7.5 metres or heavier than 12 tonnes will need to detour via the Illawarra Highway and Princes Highway.
Transport for NSW said vehicles of this size should allow up to 90 minutes additional travel time.
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