The first plan presented provided that line 5 would depart from the center of Monterrey to the Mederos colony in the south of the municipality, having an original length of 8.5 kilometres (5.3 mi).

[1] On 9 September 2022, the technical openings were completed as part of the process of the international public tender, two consortia were registered to win the award of the construction of Lines 4, 5 and 6.

[5] On 23 September 2022, the tender was awarded for the construction of lines 4, 5 and 6 of the Metro to the consortium formed by the Portuguese firm Mota-Engil de México and the Chinese CRRC Hong Kong.

The Secretary of Urban Mobility and Planning of Nuevo León Hernán Villarreal explained that the tender has two cost options and that both are profitable for the administration.

The consortium formed by Mota-Engil and CRRC will sign the contract on 26 September at 10:00, at the offices of the Legal Directorate of the Secretariat of Mobility and Urban Planning, located in the Administrative Tower.

[10] They argued that lanes would be reduced on Garza Sada Avenue, businesses with the works would be closed and, in addition, aesthetically, will impact the properties and surplus value.

For this reason, on 15 February 2022 they protested in front of the Palace of Government, where they delivered a letter addressed to the governor of Nuevo León, Samuel García, to listen to them and build Line 5 underground.

[12] In August 2022, García warned the opponents that the work on Line 5 will be done, since in the last months of last year the support of the vast majority of the southern neighborhoods has been quite positive and encouraging.