According to a local source this is properly known as the ‘Queen Of Peace’ statue.
This one at Broadstone is a bit unusual in that it was erected in 1953 by railway and bus workers of CIE, a state transport company, on company property. I do not know who maintains the installation but it is in good condition. In any photographs that I have seen it appears to be painted white but in my photographs it appears to be unpainted concrete.
According to one of my contacts there is another one at Inchicore Railway Works buy I have not seen it.
Below is an official description of the Marian Statue [AC89] At Broadstone:
This statue is located outside the former Broadstone station terminal building (AC89) to the immediate west of an ashlar limestone wall which comprises the remains of Foster Aqueduct (AC86). It is located in an area surrounded by a low curved wall topped by a railing and is facing east looking out over the Constitution Hill/ Western Way/Phibsborough Road junction. The statue was sculpted by A. Powers and Sons. The inscription on the base reads: “Erected by the employees of Córas Iompair Éireann to the honour and glory of our lady queen of peace, May 1953. Pray for us.”