[1] The construction of the underpass began in 1962 during the term of Manila Mayor Arsenio Lacson who would die in office within the same year.

[3] Upon its opening, the Lacson Underpass had an air-conditioning system installed but the condition its facilities deteriorated over the years after Villegas' mayoral tenure.

[4] In early 2014, the Lacson Underpass was closed for renovation under the administration of Mayor Joseph Estrada.

The city government entered a joint agreement with White Scope Property Management, the owner of the Victory Malls shopping chain for the renovation works.

[3] The Lacson Underpass under White Scope was only accessible to pedestrians for a limited time per day, until June 2019, when the underpass was made accessible 24 hours a day in compliance with then-Mayor-elect Isko Moreno's orders.