Rail users can make use of free wi-fi internet access on selected Dublin to Cork services, Iarnród Éireann said today.
An initial trial of the service will last six months while rail chiefs assess the uptake.
Iarnród Éireann said coverage was strong on the Dublin to Cork line, with access to mobile broadband networks from O2, Vodafone and 3.
If successful, the service will be rolled out to other routes including Intercity, Dart and Commuter services.
"Many customers are already travelling with us because rail travel offers the scope to use travel time productively," said an Iarnród Éireann spokesman.
"Wi-fi obviously broadens such scope dramatically."
Tests have shown that passengers should be able to get download speeds of up to 3.5 megabytes.
PA