Most people complied with new rules on wearing face coverings on public transport that came into force yesterday, Translink has said.
Face coverings are now mandatory on bus, train and ferry services as well as public transport premises, such as stations.
Exemptions include those who cannot wear face coverings for medical reasons and children aged under 13. The PSNI has indicated that it will rely on "other bodies" to help enforce the rules.
However, Translink said: "Our staff have been helping passengers understand the new guidance; and we are pleased to see there has already been a high number of customers using face coverings on our services and at our stations today."
At Great Victoria Street station yesterday, commuters were still divided over their use and effectiveness in helping stop the spread of Covid-19
Inside the Europa Bus Centre, Translink officials were on hand issuing people with face masks as they entered the station and reminding them about the rules.
Overall staff said they were happy to see that the vast majority of people were complying.
Andrew Cooper (51) from Comber had just arrived off the bus from Dublin Airport where he had flown in from Holland.
"The main problem I find is that my glasses keep steaming up when wearing a mask," he said.
"Everybody on the bus had one on so people seem to be complying. I flew in from Amsterdam and everyone in the airport had one on as it's regulatory there also," Andrew added. "Possibly it's a little bit safer when you're in areas where there are lots of people but who knows.
"It's just matter of fact now and if you have to do it then you have to do it, at least until we get a little jag or a tablet."
Rafael Henriqes (21) and three friends had travelled up from Dungannon for a day in the city.
Having worn face masks already for the past few weeks, Rafael was glad to see it was now the rule for everyone.
"Everybody had a mask on on the bus and I felt a lot safer. For me there was no difference as I've been wearing them for a while so I hope everyone else will do the same," he said.
Ursula Gray (56) from Pomeroy and her sister Dympna McCluskey (58) from Donaghmore said they were respectful of the need to wear masks.
"I feel much more comfortable on public transport wearing one, for more my own protection and everyone else's, so I endorse it.
"We saw one man being handed a mask by a Translink official who chose not to wear it which was a bit disappointing but hopefully people will get the message," Ursula said.
Dympna added: "This was my first experience of wearing a face mask on the bus. Because it's mandatory I have no issue although I was glad to get outside and take it off."
Sarah Holness (52) and Derek Cooke (70) were surprised to see some unmasked commuters on the Portadown train. "We counted about six people with no masks on the train and others in the station," Sarah said. "In fairness maybe they had medical problems but I thought the staff might have enforced it."