Mexico City Metro Line A is one of the twelve metro lines operating in Mexico City, Mexico. The line's color is purple. It was the ninth line to be opened. The line was opened in 1983 and it runs from eastern Mexico City southeast into the State of Mexico. Line A has 10 stations and a length of 17.192 km (10.683 mi), out of which 14.893 km (9.254 mi) are for service. It was the second line to service the State of Mexico, after the Cuatro Caminos station of the Line 2, opened in 1984. From Wikipedia