North Carrollton Transit Center, located about 0.5 miles (0.80 km) east of the current station, opened on October 31, 1988.

[7] In late October 2010, DART offered a preview run of the Green Line, which ran between Downtown Carrollton and Trinity Mills, during the first annual Festival at the Switchyard.

[10] A month and a half later, on December 6, 2010, the Green Line's second expansion, including Trinity Mills, opened.

[2] A-Train service began June 20, 2011 with a ceremonial ride from Downtown Denton Transit Center to Trinity Mills.

[11] In 2003, Carrollton purchased a 12.5 acre site adjacent to Trinity Mills for the purposes of future development.