After four years of construction, the new Luas Green line is ready for lift-off in Dublin City Centre.

An extra 10 million passengers a year are expected on the line connecting Stephens Green to Broombridge in Cabra.

The triad of transport ministers - past and present - officially open the new #LuasCrossCity line in Dublin pic.twitter.com/FtDj9iUOww

— Mick Staines (@shhtick) December 9, 2017

Test runs have been taking place since June, while warnings have been issued to pedestrians, cyclists and motorists in recent weeks ahead of today's launch.

Launching the service this morning the Taoiseach said it will make a real difference to life in the city: