The project also includes plans for a new DART depot west of Kilcock Station
Rail passengers are being advised of a number of disruptions to services over the weekend
It comes as work is set to begin on the DART + West project.
All services to and from Heuston tomorrow will be affected due to works between there and Hazelhatch
There will be bus transfers in place from Portarlington, Athy, Kildare, Galway and Portlaoise.
There are also no trains between Clonsilla in Dublin and the M3 Parkway on Saturday or Sunday to allow for works.
DART+ West will see approximately 40 kilometres of railway electrified, extending DART services towards Kilcock and M3 Parkway and providing more frequent services for commuters travelling to and from Dublin.
The project also includes plans for a new DART depot west of Kilcock Station, subject to separate planning approval.

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