Why is there no AC in subway?

Instead, air is passively released through ceiling grates and circulated when trains blast through the tunnels. (It's impossible to provide air conditioning in stations, because the system wasn't built with space for the machinery, and there are too many openings to the street.)



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There are several reasons why NYC trains may be slow: 1. Aging infrastructure: The subway system in New York City is one of the oldest in the world, with some lines dating back to the early 20th century. The aging infrastructure can lead to delays and slower train speeds.

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There is, however, one peculiarity: while the subway trains are named after letters of the alphabet, several letters are missing. There's no H, I, K, O, P, T, U, V, W, or Y train.

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