As the Deputy may be aware, the National Transport Authority (NTA) has responsibility for the planning and development of public transport infrastructure, including the public transport fleet.
The Government is committed to the decarbonisation of the public transport sector in line with the Climate Action Plan. No new diesel-only buses have been purchased for urban public service obligation bus fleets since July 2019, as set out in the National Development Plan 2018-2027. The transition to a zero-emission urban bus fleet is currently programmed to take up until 2035, based on replacement of non-zero-emission buses as they reach the end of their efficient service lives.
Noting the NTA's responsibility in this matter, I have referred the Deputy's question to the NTA for a more detailed reply. Please contact my private office if you do not receive a reply within 10 days.