NYC’s shiny new trains sidelined just one month after their debut — and it’s not clear when they’ll be back

The Metropolitan Transportation Authority sidelined Staten Island’s newest train cars just one month after their debut — and it’s not clear when exactly they’ll be back on the tracks. Five shiny, new blue-and-silver R211 cars are sitting in the yard of the MTA’s Clifton Maitenance shop because of an issue with signal systems that was...