In really simple terms, they want to rip out the current signalling between Clonsilla and Drumcondra and put in a brand new system allowing more trains to run closer to each other. At least 2 level crossings will be closed, possibly 3 that will mean the signalling can be better spaced. The equipment will all be DART compatible
City Centre works involve some serious works at Grand Canal Dock to get a third platform working
Overall it will mean more trains running closer together at faster speeds, its been on the table since 1999 and nothing has been done
Logically if the city centre is the bottleneck you fix that first as that will be the quickest way to releave the pain on the Maynooth line, more trains now.
This is exceptionally complicated stuff requiring very skilled engineers and has to be done without effecting services.
Far more detailed discription will be up in the members area shortly
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