Line F is a planned addition to the Buenos Aires Underground. In 2019, the government of Buenos Aires was looking for a group to create a plan of the line, but this study was cancelled in 2022. The city decided to create a study with their own staff, which is still underway as of 2024. The estimated cost of the project has risen from 800 million dollars, to 2 billion USD.

Overview

Permission to construct the line was originally granted in 2001, in a sanction which also included lines H (partially completed) and line I (not started). The line is set to be the most modern in the network, using automatic trains, a communications-based train control system like the one being installed on Line C, and platform screen doors. The line is also expected to have the highest ridership when compared to the existing lines, at 600,000 riders annually. In the 2019 tender, eight of the thirteen stations were connected to other lines on the network.

Line E ghost stations

In 2006, it was considered whether the two Line E ghost stations (San José vieja and Constitución) could be used as the southern point of Line F, considering they overlapped the line's trajectory. However, it was later decided that Line F would use a completely new tunnel with new stations given the frequency the line is expected to have.

Line plan

P. Italia - Constitución: