Cheaper public transport fares have been extended to include more young adults after the original measure was announced as part of the budget.
Reduced rates were due to be offered to those aged 18 to 23, but those aged 24 and 25 will now also be able to avail of the discount up to their 26th birthday.
The measure also applies to full-time students over the age of 16.
Those who qualify can avail of the young adult leap card, which allows them to pay half-price for their fares on all public transport services and participating commercial services.
"We are seeing big increases in public transport passenger numbers and this is being led by young people in particular," Minister for Transport Eamon Ryan said, welcoming the age expansion.
"With this extension, it also means that more young people who may be staring along their work paths can also enjoy lower cost travel."
The Green Party leader added that while recent measures to cut public transport fares are reducing the individual cost burden, they are also helping to reduce emissions and tackle congestion in built-up areas.