Express on the Astoria (Queens), Broadway (Manhattan), and 4th ave (Brooklyn) lines. In fact, there is only stretch where anyone has a chance at superceding a W, and that is between 42nd and 57st Manhattan. The 5's express service in the Bronx is only during the height of the rush, the Ws is #6 and 7 style. Also, when this happens, the only express tracks in Queens that won't be used in regular service are the Hillside ave ones.