[5][needs update] It was built by French companies Engie and Thales Group.

The first phase of the line was originally inaugurated on 14 January 2019, but actual service did not start until more than two years later.

[6] The early inauguration was a political maneuver by President Macky Sall to draw attention to his accomplishments in the lead-up to his re-election.

[7] Regular passenger service running the 13 stations from Dakar to Diamniadio began on 27 December 2021.

Before opening, protests were held by some Dakar citizens who felt they had not been sufficiently compensated by the government after their homes and businesses were demolished during the line's construction.