S (New York City Subway service)

Other routes have in the past been designated S or SS; the label has also been used for temporary shuttles due to construction.

Before June 1979,[4] all shuttles had the label SS; the designation S was reserved for "special" services, including IND trains to Aqueduct Racetrack.

The SS label was first applied in 1967, when some services were relabeled due to the completion of the Chrystie Street Connection (see New York City Subway nomenclature § History).

When the Transit Authority began assigning labels to all services, the Third Avenue Elevated was designated as 8 because it was deemed too long to be considered a "shuttle".

Late night 3 service ended on September 10, 1995,[7] due to low ridership,[8] and was not restored until July 27, 2008.

[9] After the BMT Myrtle Avenue Line south of Broadway ceased operation on October 3, 1969, the MJ service was discontinued and the current nighttime M shuttle was formed, using the lower-level platforms in the same station complex.