Transport 21

Transport 21 was an Irish infrastructure plan, announced in November 2005. Its aims were to greatly expand Ireland's transport network. A cost estimate of €34 billion was attached to the plan at the time.

The plan included continuing investment in Ireland's road network, along with investment in public transport in the form of buses and rail.

Due to the economic decline, the Transport 21 project was cancelled in May 2011.

A significant portion of this investment would focus on the creation of an integrated rail network in Dublin. Projects included a tunnel under Dublin city centre connecting Heuston Station with Pearse Station and Docklands station at Spencer Dock. This would facilitate the expansion of the Dublin Area Rapid Transit (DART) system from one line to two. Also included were several new Luas lines, a metro system, and tighter integration between all rail systems, particularly at the planned St. Stephen's Green interchange. This would create a single integrated rail network in Dublin that served the north, south, east and west of the city.