3 ms·

That would be great if feasible, but I think most transfer stations have lines crossing each other at near 90° for obvious reasons, which would make this imposs

That would be great if feasible, but I think most transfer stations have lines crossing each other at near 90° for obvious reasons, which would make this impossible.

rob74 3y ago
I think most of these stations are on networks that had a coherent planning that was followed through from the beginning - like in Munich, where the U-Bahn network started to be built in the 1960s (late compared to Berlin and Hamburg) and was continuously under construction, mostly following the original plan, until 2010. Munich has two of these cross-platform transfer stations, Scheidplatz and Innsbrucker Ring. Both of them were built with 4 tracks from the beginning and had to wait several years (or even decades) until the cross-platform transfer concept was actually fully used with two lines coming from different directions and also continuing in different directions. There are two more four-track stations (Münchner Freiheit and Olympiazentrum) which will probably never be used as cross-platform transfer stations - I think at Olympiazentrum the additional tracks were intended to increase capacity for large events (football matches, concerts etc.).
RaoulP 3y ago
You’re right, it wouldn’t be possible. I’m in Taipei now, not every intersection looks like this. But I remember seeing it at Chiang-Kai Shek Memorial Hall station (https://en.wikipedia.org/wiki/Chiang_Kai-shek_Memorial_Hall_metro_station?wprov=sfti1 https://en.wikipedia.org/wiki/Chiang_Kai-shek_Memorial_Hall_...). On the Taipei MRT map you’ll see that both the red and green lines make a change in their trajectory here, allowing them to go parallel. I think the technique the OP described is “necessary, but not sufficient” for these types of transfers.
lmm 3y ago
If that's the only issue you could have both lines turn 45° before and after the station so that they're parallel for a short stretch.
- yongjik 3y ago
  Well, that's only going to work if there's enough underground space for railways to turn 45° before entering the station. Judging from what I've seen, most "important" transfer stations are in an urban district where railroads follow existing roads, so curving them would send the lines underneath existing buildings, making it more expensive and also slower (trains don't like to turn, after all).
  - lmm 3y ago
    Following roads is generally specific to a few early metro systems, I don't think it's a common technique in general.

That would be great if feasible, but I think most transfer stations have lines crossing each other at near 90° for obvious reasons, which would make this impossible.

rob74 3y ago

I think most of these stations are on networks that had a coherent planning that was followed through from the beginning - like in Munich, where the U-Bahn network started to be built in the 1960s (late compared to Berlin and Hamburg) and was continuously under construction, mostly following the original plan, until 2010. Munich has two of these cross-platform transfer stations, Scheidplatz and Innsbrucker Ring. Both of them were built with 4 tracks from the beginning and had to wait several years (or even decades) until the cross-platform transfer concept was actually fully used with two lines coming from different directions and also continuing in different directions. There are two more four-track stations (Münchner Freiheit and Olympiazentrum) which will probably never be used as cross-platform transfer stations - I think at Olympiazentrum the additional tracks were intended to increase capacity for large events (football matches, concerts etc.).

RaoulP 3y ago

You’re right, it wouldn’t be possible. I’m in Taipei now, not every intersection looks like this. But I remember seeing it at Chiang-Kai Shek Memorial Hall station (https://en.wikipedia.org/wiki/Chiang_Kai-shek_Memorial_Hall_metro_station?wprov=sfti1 https://en.wikipedia.org/wiki/Chiang_Kai-shek_Memorial_Hall_...). On the Taipei MRT map you’ll see that both the red and green lines make a change in their trajectory here, allowing them to go parallel. I think the technique the OP described is “necessary, but not sufficient” for these types of transfers.

lmm 3y ago

If that's the only issue you could have both lines turn 45° before and after the station so that they're parallel for a short stretch.

yongjik 3y ago
Well, that's only going to work if there's enough underground space for railways to turn 45° before entering the station. Judging from what I've seen, most "important" transfer stations are in an urban district where railroads follow existing roads, so curving them would send the lines underneath existing buildings, making it more expensive and also slower (trains don't like to turn, after all).
- lmm 3y ago
  Following roads is generally specific to a few early metro systems, I don't think it's a common technique in general.