Only on the NYC subway: U2 performs underground, de Blasio bemoans train delays and a garbage can explodes

Earlier this week, the bureaucrats that keep the delay-ridden, overcrowded subway system in more-or-less working condition sounded an alarm.

“The MTA and its transit system are at a crossroads,” MTA Chairman Thomas Prendergast wrote to First Deputy Mayor Anthony Shorris in a letter calling on the city to devote at least $1 billion to the Second Avenue Subway over five years.

The city has said it would give the MTA $657 million over the next half-decade.

Here’s what else happened on the subway this week.