New figures from the Central Statistics Office show that the total number of rail and bus journeys is at its highest level since the beginning of the year.
Public transport services returned to full capacity from the beginning of September.
The CSO said this is reflected in increasing rail and bus journeys which are now at their highest level since the start of 2021.
The total number of rail and bus journeys is now 70% of those taken in early March 2020 in pre-Covid times, it added.
Today's CSO figures also show that while car traffic volumes have not returned to pre-Covid levels, the gap between 2021 and 2019 figures is gradually declining.
Latest available data for the week starting September 27 show that the volume of cars in regional locations is 13% higher than in the same week of 2020.
But car traffic volumes are still 10% lower than the same week in 2019.
Meanwhile, the number of passengers travelling through Dublin airport in August this year rose by 93% compared with the previous month, the CSO added.