As the Deputy may be aware, the National Transport Authority (NTA) is responsible for the development and implementation of public transport and sustainable transport infrastructure in the Greater Dublin Area (GDA), including the Luas Cross City Green Line Extension.
I am informed by the NTA that trials abroad for installing a rubber insert, or similar, into rail grooves have not been successful, with the material becoming ripped and dislodged by the tram wheels during operation. Therefore, the NTA does not propose to use that approach. An alternative approach which would provide a satisfactory long-term solution has not yet been identified to the NTA that would provide a hazard-free surface along tram lines, while accommodating significant tram, bus, taxi and cyclist movements. Collaboration is ongoing between NTA, TII and the City Council and will guide the future approach to this matter.
Noting the NTA's responsibility in the matter, I have referred your question to the NTA for a more detailed reply with regard to the issues raised. Please advise my private office if you do not receive a reply within 10 working days.