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DART+ (DART Expansion)

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Comments

  • Moderators, Science, Health & Environment Moderators Posts: 5,320 Mod ✭✭✭✭spacetweek


    The journalist must have fixed the article after it was published because it says that D+SW was granted permission in Nov.



  • Registered Users, Registered Users 2 Posts: 434 ✭✭Ireland trains




  • Registered Users, Registered Users 2 Posts: 308 ✭✭danfrancisco83


    From the Dartplus website -

    "The first of the infrastructural projects of the DART+ Programme to be delivered will be the DART+ West project"

    Is that still true?



  • Registered Users, Registered Users 2 Posts: 18,710 ✭✭✭✭LXFlyer


    They may move DART+ Southwest ahead of it given it has full permission.



  • Registered Users, Registered Users 2 Posts: 4,366 ✭✭✭goingnowhere


    It might, but there is a sequencing issue

    DART+ fleet requires ETCS L1 fitted lines and the plan for DART+ southwest assumes there will be electrification from Cabra and both routes into Connolly/Docklands, i.e DART+ West exists

    Can't replace the signalling on DART+ West until the level crossings are closed

    Also have a fleet issue as there is no capacity beyond the current order, so until the depot in Maynooth (or where ever it will be) is built you can't order more DART+ fleet

    And you need ETCS to get to the depot even if you have a battery

    Its a nasty web of dependences



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  • Registered Users, Registered Users 2 Posts: 1,399 ✭✭✭Consonata


    To be honest, It's one of the major downsides of breaking the project into so many parts. Like yes, it prevents small things from sinking the whole project, but it seems like we're going to have that happen anyway, with these necessary dependencies not happening. That, in addition to the duplification of work that happens across each individual planning proposal, really seriously calls into question for me the merits of breaking them into so many seperate projects.

    We did that with BusConnects too and I honestly don't think I would call that a success.



  • Registered Users, Registered Users 2 Posts: 10,724 ✭✭✭✭MJohnston


    Nah you have to split these big projects up, it's really the only way for infrastructural progress to happen in Ireland



  • Registered Users, Registered Users 2 Posts: 297 ✭✭Thunder87


    If the above is accurate and there's so many dependencies then you'd think it would have made sense to have split the applications based on critical path dependencies rather than big neatly packaged projects.

    i.e. if nothing can be done without X first being in place then that should have been it's own relatively simple planning application, instead of grouped in with one project which then ties everything else up



  • Registered Users, Registered Users 2 Posts: 18,710 ✭✭✭✭LXFlyer


    There’s nothing to say that some of the infrastructure work couldn’t start though, such as getting the overhead wires in place for example.



  • Registered Users, Registered Users 2 Posts: 4,366 ✭✭✭goingnowhere


    Until the RO is signed it would be unwise to undertake any works the RO covers

    If you look at DART+ Southwest you only really needed the RO for the Park West/Heuston/Cabra bit the rest should be doable without any planning bar the substations.

    For DART+ West an RO was needed for almost all the route due the impact of the level crossings. But you could have done Clonsilla-M3 and East of Ashtown without planning

    They didn't seek a RO for the DART works in the 80's



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  • Registered Users, Registered Users 2 Posts: 18,710 ✭✭✭✭LXFlyer


    I’m talking about DART+ Southwest.

    The Railway Order is approved. The next step is final cabinet approval of the business case.



  • Registered Users, Registered Users 2 Posts: 68 ✭✭Crakepottle?


    People whose property will be affected by the Dart South West received another letter last month stating that construction will commence no sooner than 2026.Those people were advised that they needed to do nothing regarding legal advice on compulsory purchase until further notice. Must be annoying for anybody needing or wanting to move house. Eminent domain is the name of the game.



  • Registered Users, Registered Users 2 Posts: 2,411 ✭✭✭KrisW1001


    2026 starts in ten months…it's not as far out as it sounds.



  • Registered Users, Registered Users 2 Posts: 1,505 ✭✭✭p_haugh


    Some good footage of the testing taking place between Incicore & Hazlehatch!



  • Registered Users, Registered Users 2 Posts: 1,127 ✭✭✭Rulmeq


    I'm not a massive fan of the looks (it's kind of growing on me, but it's very boxy. The livery is nice and clean, but I'm still not 100% sure about it, I guess lets see how it ages). Those windows look to be too low down if you're standing up (at least they are very big). But I do like the proper horn as opposed to the DART squeak. I guess this is one of the battery powered sets, as there's no power lines out to Hazelhatch (yet)



  • Registered Users, Registered Users 2 Posts: 2,411 ✭✭✭KrisW1001


    Am I right to say that only BEMU sets have been delivered so far?



  • Registered Users, Registered Users 2 Posts: 1,456 ✭✭✭bikeman1




  • Registered Users, Registered Users 2 Posts: 4,366 ✭✭✭goingnowhere


    Not quite the first batch includes 6 EMU, second batch is entirely BEMU, third batch if/when ordered will be EMU



  • Registered Users, Registered Users 2 Posts: 2,438 ✭✭✭VonLuck


    I'm sure it's been answered before and there's a logical reason for it, but why aren't all future DART+ trains BEMUs? Would this not eliminate a significant portion of the infrastructure works required for overhead lines?



  • Registered Users, Registered Users 2 Posts: 7,905 ✭✭✭GerardKeating


    Why carry the extra weight of the batteries when most of the DART network does have overhead catenaries…



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  • Moderators, Motoring & Transport Moderators, Technology & Internet Moderators Posts: 23,623 Mod ✭✭✭✭bk


    Interestingly with them going to both Drogheda and Wicklow with batteries, it will be 54km of OLE versus 40km of battery, so while still more OHLE, I don't think you can really say it is mostly OHLE. More like a 60/40 split.

    Though perhaps VonLuck is more thinking of the Western lines. I've been thinking the same myself. If they face planning issues with the DART+ West and SW projects, could they still go ahead with battery trains in the meantime until the planning issues are resolved and OHLE built out.

    The issue here of course is the new depot. I'm guessing they don't have the space for greatly increased fleet in the existing depots. But perhaps they could at least buy a smaller number of battery trains in the short term to replace just the existing Diesel trains, so while lacking the capacity increase, at least the existing services are modernised and decarbonised and it frees up the old Diesels to be used to increase capacity elsewhere in the network.

    Of course not ideal, but just a thought.



  • Registered Users, Registered Users 2 Posts: 2,200 ✭✭✭Economics101


    There is a reason why just about every country in Europe has gone for full electrification. Ireland and the UK are seriously behind the curve.



  • Registered Users, Registered Users 2 Posts: 2,438 ✭✭✭VonLuck




  • Registered Users, Registered Users 2 Posts: 4,366 ✭✭✭goingnowhere


    The reason is very simple, complete lack of trust in Government support and the planning system

    You don't want to end up with a train stuck in the sidings you can't use

    The first fleet order is sized as a 1:1 replacement of the 1984 DART fleet, thats no coincidence, thats how little trust there is in the money being made available for infrastructure. If everything else failed they had a home for the order and a business case.



  • Moderators, Motoring & Transport Moderators, Technology & Internet Moderators Posts: 23,623 Mod ✭✭✭✭bk


    That isn't really saying much. Most of Europe electrified their rail over the past century, when the only other option was Diesel. Batteries as an option have only become a thing over the last 2 years or so, so they should be considered.

    Also it isn't really true to say Europe has full electrification! Only 57% of lines in Europe are electrified, that means 43% aren't. Plenty of Diesel trains running around quieter lines all across Europe and they too are looking at alternative options for decabonisation of these quieter lines.

    Truth of the matter is outside of the Dublin network, most of Irelands rail would fall into that category of "quiet" lines with not enough frequency to really justify electrification. Though with Belfast going hourly and Cork eventually 30minutes along with sharing with Limerick, etc. the Cork to Belfast line will likely hit a level to justify it.

    To be clear, I'm not for a moment saying that we shouldn't eventually electrify the DART lines, etc. but more just pointing out the reality that it isn't as obvious as some make out.



  • Moderators, Motoring & Transport Moderators, Technology & Internet Moderators Posts: 23,623 Mod ✭✭✭✭bk


    I will add, the reasons why you would ideally want to convert from Battery to OHLE:

    • The extra weight of the battery will mean you will need more electricity to drive the train, which means it is less efficient then OHLE. Probably still much better then Diesel, but not as efficient as it could be.
    • The batteries will degrade over time and will apparently need to be replaced after 14 years. That is obvious extra cost and it also goes for the BESS buffer they will have in Drogheda.

    On the second point, I will say with how quickly battery tech is advancing, with lifetimes expanding and prices dropping at extraordinary rates, it will be interesting to consider how much it might cost to replace them in 14 years versus now and 30 years from now etc. and how the cost of replacing batteries might compare to the capital cost of installing OHLE.

    I don't have an answer for that, again just an interesting thought.



  • Registered Users, Registered Users 2 Posts: 3,098 ✭✭✭Citizen  Six


    No decent investment in the railway means OHLE infrastructure is still very far away. Short term solution is going for these BEMUs, to get us out of a hole.

    As for diesel, Cork and Belfast passenger services running on two stroke engines can't go on forever. 😂



  • Registered Users, Registered Users 2 Posts: 2,200 ✭✭✭Economics101


    BEMUs may be a stopgap solution for fairly short journeys, like Malahide-Drogheda. Long-distance mainline journeys are way beyond BEMU range. No doubt people will bring up the possibility of Hydrogen-powered MUs, which in my opinion are hugely problematic.

    One reason why the powers that be may be scared of electrification is the UK's experience witth large shambolic cost-overruns. There are reasons for this and we can learn from the experience elsewhere.



  • Registered Users, Registered Users 2 Posts: 3,098 ✭✭✭Citizen  Six


    Increasing capacity for commuter areas is the priority, over the likes of long distance mainline journeys.

    There's still bottleneck issues with the infrastructure though. New trains and ETCS won't fix it all.



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  • Registered Users, Registered Users 2 Posts: 2,200 ✭✭✭Economics101


    You also say: "As for diesel, Cork and Belfast passenger services running on two stroke engines can't go on forever."

    So we can't keep with diesel (OK), BEMUs don't have long range, and mainline electrification has to yield to high-priority commuter routes. What do you propose? Hydrogen power, with its huge uncertainties, logistical problems and other risks? Or maybe just shut down those pesky long-distance rail routes?



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