in the peak direction – 8:00 p.m. to 9:30 p.m. (4) weekends – 6:30 a.m. to 12:00 a.m., Saturday and Sunday (5) late nights – 12:00 a.m. to 6:30 a.m., every day (5a) weekday late nights (5b) weekend late nights Other symbols are derivatives and are defined based on the rules above: all times – 24 hours a day, 7 days a week all times except rush hours in the peak direction all times except weekdays in the peak direction daily – criteria (1), (2), (3), and (4) above (all times except late nights) daily except rush hours in the peak direction daily – criteria (1), (2), (3), (4), and (5b) above (all times except weekday late nights) weekdays – criteria (1), (2), and (3) above nights and weekdays – criteria (1), (2), (3), and (5) above weekdays and weekday nights – criteria (1), (2), (3), and (5a) above nights and weekends – criteria (4) and (5) above weekends and weekend nights – criteria (4) and (5b) above limited service during rush hours – criterion (1) above, but only for selected trains limited service during rush hours in the peak direction service during rush hours in the reverse peak direction – opposite of criteria (1) above limited service during rush hours in the reverse peak direction Service listing Lines with colors next to them are the primary trunk line of the corresponding service; they determine the color of the service bullets and diamonds, except shuttles, which are dark gray. Current services Future services Service variants The 6 service has a midday (2a) and rush hour (1a) diamond Bronx express service labeled <6>, in addition to 6 local service. The 7 service has a rush hour (1a), and evening (3c) diamond Queens express service labeled <7>, in addition to 7 local service. Overnights (5), the A train between and is replaced by a shuttle which originates at Euclid Avenue. This service has been labeled on the late-night map as (gray A) and on trains as (blue S). The F service has a rush hour (1a), diamond Brooklyn express service labeled <F>, in addition to F local service. Several services operate shorter routes during lower ridership hours, but these are neither signed differently nor counted as separate services. Although service changes caused by General Orders for construction occur on most days during midday and overnight hours, and throughout most weekends, these changes