New public transport timetables have taken effect, with Irish Rail operating a 60 per cent reduction in service.
Bus operators are to follow suit on Wednesday, while there's been a drop in passenger numbers by around 80 per cent, since the beginning of the Covid-19 pandemic.
The NTA say it's confident social distancing will be possible with reduced services and passengers.
Chief executive Anne Graham expects the number of people using public transport to reduce even more.
"We've seen a reduction in passengers numbers of about 80%.
"We expect that following the latest government announcement requiring only essential workers and essential trips, we expect to see a rdueciton of 90% if not more."
