Last Stop wrote: » The volume of spoil of 2 slightly smaller twin bore tunnels is greater than 1 single bore tunnel. In the single bore tunnel, the diameter is being driven by the height rather than width so a single bore tunnel isn’t that much bigger.
Last Stop wrote: » Not just Eamon Ryan, a newsletter was issued by Catherine Martin advocating for Eamons proposals.
gjim wrote: » A large 2-track single bore tunnel will only be slightly less than double the diameter of a single track tunnel all things considered. Yes metro cars are a little higher than wider but not enough to compensate for the fact that such a large tunnel generates twice as much spoil as two half-diameter tunnels.
Kevtherev1 wrote: » And Catherine Martins Husband Noel Francis Duffy also issued the same newsletter. Entire back page was the South metro and luas lines in south dublin crayon nonsense the greens used to hustle votes.
The project involves trackworks, electrification and resignalling primarily on the Coastal line from Drogheda in the north to Connolly station and from Connolly station to Greystones. The proposed key elements may include: • Electrification, re-signalling, track and associated civil works to support the projected capacity increase of the Northern Line from Malahide to Drogheda; • Re-configuring Clongriffin & Howth Junction Station; • Re-modelling of Drogheda and Fairview Depot and the provision of Battery Electric Multiple Unit (BEMU) charging facilities; • Turnback Facilities on the Northern & Southern Lines; • Siding & Stabling facilities; • Investigate the comparison of a BEMU strategy versus electrification of Northern Line; • Design an appropriate level of relief infrastructure (structures, civils, signalling, electrification, telecoms, track) in lieu of the increased frequency of level crossing closure on the Southern Line between Greystones & Connolly; and • Greystones Capacity Improvement including potential 3rd platform.
marno21 wrote: » Tender out for multi disciplinary consultants for DART Expansion on the Dublin Coastal (Northern + Southeastern) line Includes the following:https://irl.eu-supply.com/ctm/Supplier/PublicPurchase/165273/1/0
Jammyd wrote: » Hi Marno - stupid question but is the Maynooth / M3 line electrification being done as a seperate tender / project? I was of the understanding the Dart expansion was announced as one project - (Vested interest on my part as I'm beside Hansfield station and can't wait to get an actual decent train service vs the joke schedule we have at present)
marno21 wrote: » The project has been split into three separate sections being advanced through design and planning individually at least: Maynooth/M3 Parkway + City Centre Hazelhatch/Kildare Line Drogheda-Greystones The Maynooth is the most advanced, IE started pre railway order application consultations with An Bord Pleanala in February
CatInABox wrote: » Kinda shocked that they're considering not electrifying the northern line. Very shocked in fact.
• Greystones Capacity Improvement including potential 3rd platform.
AAAAAAAAA wrote: » " Electrification, re-signalling, track and associated civil works to support the projected capacity increase of the Northern Line from Malahide to Drogheda;" reads to me like they're electrifying it
CatInABox wrote: » It's this part I'd be concerned about: "Investigate the comparison of a BEMU strategy versus electrification of Northern Line"
roadmaster wrote: » I Know this probably the wrong place to ask but long term I would presume the entire Irish Rail network will be electrified, so will that mean overhead lines on the entire network or by the time we go to electrify the national network will technology have moved on that a battery operated train will make it from Dublin to Cork?
Idbatterim wrote: » the timelines here are so ridiculous, that I think you are right, I would expect to battery technology to improve to such an extent, that they will just be fully battery operated trains...
Sam Russell wrote: » There are a number of options. 1. Battery only - requires recharging options which takes time. 2. Battery/OH electric. Possible for northern line using Dart OH which could also recharge the batteries. (40 km range needed and recharge before return or 80 km range). 3. diesel/OH - like the FLIRT trains. The diesel part can be removed later if it is not required. 4. AC OH/DC OH - use AC for the north of Malahide and Dart DC for south of Malahide. I am sure there are other possibilities. The big question is whether they will go AC or DC north of Malahide. Malahide is 12 km to Connolly, Drogheda is 40 km north of Malahide. If they go AC then there are fewer substations, so lower cost, but trains are more expensive. They would need AC to go to Cork or Belfast.
Tomrota wrote: » Mad that they are electrifying all the way to Drogheda, and won’t even electrify into County Kildare on the Kildare line. Electrification ends at Hazelhatch, Co. Dublin. Most short sighted thinking I’ve ever seen.
donvito99 wrote: » Stopping at Hazelhatch isn't that short sighted considering the four tracking ends there. Any you can always extend in future.
Tomrota wrote: » If it were to be extended in the future, we all know that’s gonna mean 2070+. Four tracks? Does drogheda and greystones have four tracks? The reason it doesn’t have four tracks is because of their short sightedness and unwillingness to extend the DART any further than Co. Dublin on this line.
Jamie2k9 wrote: » The problem if they electrify the current two lines it will cause problems long term because for example most rail routes use AC not DC overhead lines so it would be worth considering if BEMU is best for now.
