Transport for NSW secretary Rod Staples said there had been declines and shifts in travel patterns across all modes of transport over the past fortnight.

"It is no surprise to anyone that customer numbers are down across our trains, buses, ferries and light rail due to the coronavirus outbreak, however importantly this has created sufficient space on all modes to allow our customers to socially distance themselves in the majority of cases," he said.

"It is clear our customers are following the important advice from the government to stay at home if you are feeling sick and to avoid non-essential travel."

Mr Staples said Transport for NSW was committed to maintaining services to support customers and staff, including essential health and emergency services.

"It is clearly not business as usual at the moment but we know our network remains a critical part in keeping essential services running," he said in a statement.

"While we support government advice to avoid non-essential travel it is clear we must ensure our network remains safe and viable for the efforts going into containing coronavirus.

"A key part of our role is ensuring goods and services are able to get to where they are needed most, including supermarkets.

"The team is continuing to work closely with the freight industry to ensure we don't see any barriers emerge in critical supply chains, across roads, ports and rail."

There has been no announcement of reduced services, but Mr Staples said patronage on regional trains that require booked tickets would now be restricted.

"This week NSW TrainLink regional rail and coach customers will be booked in a way to maximise social-distancing where possible," hes said.

"As this outbreak evolves, we are making a concerted effort to keep our regional services running and safe for those communities."

Newcastle Transport operator Keolis Downer last week said it had changed cleaning procedures and increased cleaning frequency.

The city's bus, light rail and ferry services continue to run as normal.