Cranberry Street Tunnel

IND Eighth Avenue Line
The A, C, and E, which use the Eighth Avenue Line through Midtown Manhattan, have been colored blue since 1979.
Overview
Type	Rapid transit
System	New York City Subway
Termini	207th Street South of High Street
Stations	30
Daily ridership	1,007,933
Operation
Opened	1932–1933
Owner	City of New York
Operator(s)	New York City Transit Authority
Character	Underground
Technical
Line length	14 mi (23 km)
Number of tracks	2-4
Track gauge	4 ft 8 1⁄2 in (1,435 mm)
Electrification	600V DC third rail

The IND Eighth Avenue Line is a rapid transit line in New York City, United States, and is part of the B Division of the New York City Subway. Opened in 1932, it was the first line of the Independent Subway System (IND), and the Eighth Avenue Subway name was also applied by New Yorkers to the entire IND system. Most of the line has four tracks, with one local and one express track in each direction, except for the extreme north and south ends, where only the two express tracks continue. The line is signaled as Line "A", with tracks A1, A3, A4, and A2 from west to east, running from approximately 800 at the south end to 1540 at the north end (measured in feet).

The line runs from 207th Street in Inwood south to an interlocking south of High Street in Brooklyn Heights, including large sections under St. Nicholas Avenue, Central Park West, and Eighth Avenue. The entire length is underground, though the 207th Street Yard, which branches off near the north end, is on the surface. Flying junctions are provided with the IND Concourse Line, IND Sixth Avenue Line, and IND Queens Boulevard Line. Between 59th Street–Columbus Circle and 145th Street, the line can be called the Central Park West Line.