The Transport Minister Paschal Donohoe has announced proposals to increase DART services to every 10 minutes in early 2016.
The draft schedule is now online for customer feedback and public consultation.
It also includes plans for an expansion in Dundalk services - as well as extra morning peak express trains.
Irish Rail says the enhancement is in response to continuing passenger growth.
The revisions for Connolly Station routes - with DART, Northern Commuter, Maynooth/M3 Commuter, Sligo/Dublin, Rosslare/Dublin and Belfast/Dublin services - have now been posted online.
Major changes to Connolly services include:
- DART weekday 10-minute frequency: A major increase in weekday DART frequency from every 15 minutes to every 10 minutes all day
- DART weekday earlier start time: The first DART services are proposed to operate at 05.50 from Malahide (currently 06.30), 06.00 from Howth (currently 06.05), and 05.35 from Bray (currently 05.40)
- DART weekend frequency: A consistent schedule every 15 minutes on Saturday, and every 20 minutes on Sunday, eliminating some existing schedule gaps
- Extra express morning peak service from Dundalk/Drogheda: as the existing morning Belfast Enterprise service will now serve Dundalk at the earlier time of 07.30hrs and Drogheda at 07.54hrs, a new express service is proposed to depart Dundalk at 07.55hrs, serving Drogheda at 08.20hrs
- Increased frequency for Dundalk: This peak service is one of three new services in each direction daily for Dundalk on weekdays
- Dublin/Belfast Enterprise changes: a revised Dublin/Belfast Enterprise schedule will see a more even interval between services, resulting in some significant changes to departure times
- Departure time changes on all Connolly routes
Irish Rail says the proposals follow passenger growth over the past two years, which saw journeys increase from 36.7 million in 2013 to 37.8 million in 2014 - with 5% growth recorded so far this year across all services.
While DART growth is greater still, up 8% so far in 2015.
Irish Rail says revisions for Heuston routes will be published early in the new year, for implementation in Spring 2016.
