before its opening Line 8 construction started in 1991 and finished in 1994. It was inaugurated on 20 July 1994 by
President of Mexico Carlos Salinas de Gortari in its entire stretch going from
Garibaldi to
Constitución de 1917. The next day, Salinas de Gortari drove the first train. In 2018, the
Sistema de Transporte Colectivo presented its plan projected to 2030, where an expansion of Line 8 was announced. This would extend the line northbound to
La Raza, where it would connect with Lines
3 and
5; and southbound to
Santa Marta, where it would connect with
Line A. The project states that seven new stations would be built: three northwards and four southwards, with a total of for a total track length of . ==Rolling stock==