Delays expected on roads as school holidays begin in NSW

Transport for NSW acting chief customer officer Roger Weeks said last weekend's storms would have lingering impacts across the state.

"Autumn holidays are when we typically see lots of families head off camping, caravanning and adventuring, and we need people to be mindful that crews are still working hard to address the aftermath of last weekend's storms," Mr Weeks said.

"Our teams and local crews have been diligently repairing roads impacted by debris and flash flooding."

In the Blue Mountains, Megalong Road remains closed between Blackheath and the Megalong Valley.

In the Illawarra, a single lane of Lawrence Hargrave Drive has reopened at Coalcliff after multiple landslides with stop/slow traffic control in place.

Buses continue to replace South Coast Line trains between Kiama and Bomaderry.

Trains on the rest of the South Coast Line are running to a reduced timetable between Sydney and Kiama and also between Wollongong and Port Kembla.

Transport Management Centre's Derek Peterson said there were currently no major incidents on the state's roads or unusually heavy traffic on regional roads.

Main roads that would experience extra holiday traffic include the M1 Pacific Motorway between Sydney and the Central Coast, New England Highway at Tarro in Newcastle and the Pacific Highway at Hexham and Coffs Harbour.

The Great Western Highway at Blackheath in the Blue Mountains and the Hume Motorway at Pheasants Nest and the Princess Highway at Shoalhaven could also experience heavier traffic.