Shuttle trains are 2-, 3- or 4-cars long. They run every 2-3 minutes at rush hour, 5 during the day. There is no shuttle service from 12:00 am to 6:00 am. During those hours, crosstown riders must take the 7-Flushing Local. Because the shuttle is closed at night, it is a popular location to film movies.
Stops:
[[1] NYCT official S shuttle page