When I lived in the DC area, the Metro would indeed skip stops after delays sometimes. Here's an article talking about it: https://ggwash.org/view/38198/expres

When I lived in the DC area, the Metro would indeed skip stops after delays sometimes. Here's an article talking about it: https://ggwash.org/view/38198/expressing-trains-helps-metro-recover-from-delays https://ggwash.org/view/38198/expressing-trains-helps-metro-... The NY subway will also sometimes have trains switch from local to express or vice versa to help recover during delays.