The site of Trinoma used to be the location of "People's Park", a flea market built by former Mayor Brigido R. Simon, Jr. as a livelihood project for the City's nearby informal settlers (the actual market's size, though, only covered what is now Trinoma's public transportation terminal and outdoor pay parking). The park was opened at the time of Corazon Aquino's presidency. It was closed in 1995 by then-Mayor Ismael A. Mathay, Jr. to give way for the construction of the Line 3 depot to service commuters along Epifanio de los Santos Avenue (EDSA).