What are the “20”’s on the signs for? r/nycrail(00)

What are the “20”’s on the signs for? r/nycrail(00)

Image Gallery from: Nycrail Warning Signs You Shouldn’t Ignore

What are the “20”’s on the signs for? r/nycrail New signs on the (7) with the G.O. Taking the express track out of What level do you think they’re on? r/nycrail Is the Subway Risky? It May Be Safer Than You Think r/nycrail Rare roll signs r/nycrail