4 ms·

It is still doable, you can start by splitting the running stock by similarly aligned doors run them on few line and start with the few lines which are now alre

It is still doable, you can start by splitting the running stock by similarly aligned doors run them on few line and start with the few lines which are now already aligned. Realistically by the time you are even close to half the 470 stations it will be late 2020's anyway. Then you can aim for full coverage as the stock is deprecated. It is more likely the $1-2 million per station cost is not high priority as say CBTC which will improve revenue as it increases capacity.

bobthepanda 8y ago
The problem is that none of the lines except two of them are separated enough. Separating them to the degree required for this to work is not possible, because the crazy interlining is the only way to provide many trips in a patchwork system that was originally three competing subways; many transfers would not be available, and the remaining ones would not be able to handle the resulting transfer volume. It would also not be desirable, because right now reroutes are commonly used to maintain service in case of problems or maintenance; doors restricting fleets to lines would reduce operational flexibilty. The problem is also too large to segregate. We are talking about a third of the current fleet that is not compatible with new train door placements. Even after the oldest of these are retired with projected future train orders, it will be about a tenth of the fleet, larger than the entire Boston T rapid transit fleet.