A FIND would only be useful if trains get rerouted, and I wouldn't expect a train in passenger service on the to be diverted onto Broadway/Astoria. If a station is closed, the dot for it is simply disabled...
Because it would either require replacing all the motors in every unit, or would create maintenance hell in Corona Yard, with 2 sets of spare parts, one for MITRAC, other for the other system. It wouldn't be worth it.
It makes a station look much more pleasant, instead of fluorescent tubes everywhere combined with dark colours and columns everywhere. It's what makes a lot of stations look unpleasant.
The 63rd Street line probably is one of the best examples of good transit planning too. It cost about 1.5 billion dollars, and that's fairly cheap for a tunnel that does this much.
The Cranberry Street tunnel wouldn't like a combination of the , and , splitting the isn't possible ever since Court Street became a museum, and there isn't any good turnback point for trains in Brooklyn.
Hard one. via 7th Avenue would obviously overload it, so;
additional service, some trains run express on WPR
suspended between 86 St and Borough Hall, with some trains from the north terminating at 125 St
running between Dyre and E180
suspended between Grand Central and Brooklyn Bridge
additional service
suspended between Grand Central and Utica Av/New Lots Av via 7th Avenue
susended between Grand Central and Brooklyn Bridge
running local in Brooklyn
running between 205 and West 4th St
running between 168 and WTC
via Broadway Express to 57th St
via the Cranberry Street Tunnel
running to Broad Street
If south of 3 Av-138 on the means that trains can be reversed just after 3 Av-138, then suspended between 86 St and 3 Av-138. Otherwise suspended between 86 St and Hunts Point Avenue. In the latter case, a shuttle is running between Hunts Point Avenue and 3 Av-138.
suspended between 149-Grand Concourse and 86 St, via 7 Av.