#nyc
Finally! Platform screen doors should be installed at every
existing subway station where it's possible, and should be standard for
every new station built.
They prevent people
from being shoved/jumping onto the tracks, prevent trash from being
thrown onto the tracks and starting fires, and allow ventilation/climate
control for the platforms so all that brake dust doesn't flow towards
where people are standing.
https://gothamist.com/news/nyc-set-to-install-protective-platform-doors-at-select-subway-stations-in-coming-months