Signal Problems, Again, Turn Subway Commute Into Nightmare | NBC New York: Delay-weary straphangers endured yet another morning of crippling service changes Tuesday, with at least one rider so desperate to escape delays he tried walking subway tracks to get to work on time, witnesses said. Once again, signal problems appeared to be the primary cause of the nightmare.
Uptown B, D, F and M lines began to experience delays around 6:20 a.m., with at least one train stalled in between stops for more than 20 minutes as an MTA conductor warned of signal problems at Herald Square. Regular uptown service on the B and D halted entirely for a time and trains were rerouted to Penn.
See original work for more on this and other stories.