Line A is name of several transport lines: *

A (New York City Subway service) The A Eighth Avenue Express is a rapid transit service in the B Division (New York City Subway), B Division of the New York City Subway. Its route emblem, or "bullet", is colored since it is a part of the IND Eighth Avenue Line in Manhattan. ...

, U.S. *

Line A (Buenos Aires Underground) Line A is the oldest line of the Buenos Aires Underground. Opened to the public on 1 December 1913, it was the first underground line in South America, the Southern Hemisphere and the Spanish-speaking world. It made Buenos Aires the 13th city in t ...

, Argentina *

A Line (Los Angeles Metro) The A Line (formerly and colloquially known as the Blue Line) is a light rail line in Los Angeles County, California. It is one of the six lines of the Los Angeles Metro Rail system, operated by the Los Angeles County Metropolitan Transportati ...

, U.S. * A Line (RTD), Denver, U.S. * Line A (Prague Metro), Czech Republic * Line A (Rome Metro), Italy * Mexico City Metro Line A, Mexico City * Line A (EuskoTran), Bilbao, Spain (former name) * Santiago Metro Line A, a line that is in planning, Santiago Chile

See also