Infrastructure
The main route linking the two cities is along the M1 and N1 in the Republic of Ireland and the A1 and M1 in Northern Ireland.
There is also the Enterprise (train) service connecting the two city regions.
There are three major airports; Dublin Airport (25 million passengers; 2008), Belfast International Airport (5 million passengers; 2007) and Belfast City Airport (2 million passengers; 2007) which together deal with 30 million passengers each year.
- Dublin
The city is served by the Dublin Suburban Rail network, Dublin Bus network, Luas tram network, Dublin Area Rapid Transit and the planned Metro North and Metro West.
- Belfast
The city is served by the Belfast Suburban Rail network and Metro (Belfast) bus service. A rapid transport system is also planned for Belfast in the near future.
Read more about this topic: Dublin-Belfast Corridor