Mexico City Metro Line 9 is one of the 12 metro lines built in Mexico City, Mexico. Line 9 was the 8th metro line to be built in the network, built between 1985 and 1988. (Line 8 started operations until 1994). It is identified by the color dark brown, and runs from East to Wast in an almost straight fashion. It was built in order to support Line 1, providing a redistribution alternative for east-west commuters. It starts in the multi-line transfer station Pantitlán and ends at the western neighborhood of Tacubaya, both stations also served by Line 1. As a comparison, the section between Pantitlán and Tacubaya is served by 19 stations in Line 1, whereas Line 9 has only 12, which would translate in a faster alternative.