Traffic changes on Sydney Harbour Bridge, restricted access to Wynyard station, and roadworks at major intersections in central Sydney will all contribute to what authorities are warning could be a disjointed start to the year for many commuters.

NSW Transport Minister Andrew Constance said on Monday the level of roadworks and other disruptions would be more severe in 2017 than last year.

"We aren't sugar-coating this," Mr Constance said. "This is going to test people's patience.

"I thank people for the patience they have shown over the last 12 months but I want people to understand that the next 12 months is going to be even more disruptive."