Up to 90% of people are wearing face coverings on public transport. The National Transport Authority says customers are responding positively to the new rules.
Face-coverings became mandatory on public transport on Monday, but the rules aren't being enforced yet.
Also on Monday and buses, trains and trams were allowed to operate at 50% capacity - up from 20% .
The NTA says transport operators have been tracking how many customers have been wearing face-coverings.
In the greater Dublin area, compliance is running at between 75 and 98% on Bus Éireann services.
Three in four passengers on Bus Éireann city services in Cork and Waterford are wearing face coverings.
The rate's at 40% in Limerick and Galway. In rural areas, the compliance rate's at over 90% on Local Link's bus services.
60% of people arriving into Heuston Station in Dublin by train are wearing face-coverings.
