The Luas (a tram/light-rail system) runs frequently and reliably, and is handy for getting around the city centre. There are two lines - red (running from Connolly railway station and the Point Theatre to the suburb of Tallaght) and green (running from St. Stephens Green to Brides Glen in Cherrywood). The lines do not connect. The distance between Abbey Street on the red line and St Stephens Green, the start of the green line, is about a 15 min walk. The Luas is frequent and reliable. Tickets can be bought on the platforms at the machines and do not need to be validated. A large amount of further expansion of this network is expected within the next decade.
The DART suburban rail service runs along the coast between Greystones in the south and Howth and Malahide in the north. Tickets can be bought in the stations, from a window or a machine. There are four other suburban rail lines servicing areas around Dublin: , three of these lines operate from Connolly Station, the other from Heuston Station.
For Luas and DART network and station maps visit Dublin transportation Office site.