Edited sentence: Direction West-East, in the city north.From Tezozomoc to Martín Carrera, underground.Line color red.Passenger railway length 11.434 km.Rolling stock due to the low volume of persons in the line, the STC introduced six-wagon trains.Started operations  December 21, 1983: from El Rosario to Instituto del Petróleo July 8, 1986: from Instituto del Petróleo to Martín Carrera.Stations 11.Total railway length 13.947 km.Type of line El Rosario is a superficial terminal