RyLucky
Active Member
Can anyone comment further on the single vs double bore? I don't think I've ever been in a vertically stacked single bore metro station.
Apparently Barcelona Metro Line 9. A primer here: http://www.cat-bus.com/2017/10/barcelonas-line-9-inspiring-montreals-pink-line/I would prefer the side by side version all things equal. I don't recall any subway systems anywhere that have the two lines stacked upon each other.
Apparently Barcelona Metro Line 9. A primer here: http://www.cat-bus.com/2017/10/barcelonas-line-9-inspiring-montreals-pink-line/
IIRC some of the stations in Hong Kong's metro are on top of each other.I would prefer the side by side version all things equal. I don't recall any subway systems anywhere that have the two lines stacked upon each other.
If it's cheaper and can do the same thing why not right? Also, having the platforms above each other might be easier for building the passenger entrance/exit, as they would only need to be on one side of the station."Giannelia said the project team has concluded that a single-bore tunnel would be the most cost-effective and user-friendly design for the route."
I say do it if it's cheaper.
That is correct, notably Island Line stations around the Causeway Bay area.IIRC some of the stations in Hong Kong's metro are on top of each other.
Yeah. Not sure how the trade off would work re:cpted. I imagine each deep station would need a near permanent presence by special constables, with long spiral ramps or staircases and platforms that clear on every train movement. With a dual platform on the same level, you would almost always have some people waiting for the train, with clear visibility to both of the platforms, providing ‘eyes on the street’.Looking at the space in the tube, it definitely is more efficient space-wise to go with the up/down config.
That's a good question. I was wondering the same thing myself. I imagine it would be more difficult to switch trains onto another track with the single bore.So would they have to close the whole tunnel if they had to do maintenance? In a regular LRT/Subway tunnel when they work on one of the tracks, the trains go around on the other track, but I assume that the trains wouldn't be able to switch tracks with a single bore tunnel?
Nah, it works just fine. just think of where the tracks are as two single bore tunnels on top of each other, then weave them to be side by side and back. No more difficult than mining out a crossover box for a dual bore.That's a good question. I was wondering the same thing myself. I imagine it would be more difficult to switch trains onto another track with the single bore.
That makes sense. If there are no platforms involved, the two tracks can go side by side in a single bore tunnel, so having a switchover point somewhere isn't a big deal.Nah, it works just fine. just think of where the tracks are as two single bore tunnels on top of each other, then weave them to be side by side and back. No more difficult than mining out a crossover box for a dual bore.