Trinity Metro primarily operates the region's bus service, and TEXRail, a hybrid rail system connecting downtown Fort Worth with DFW Airport via Northeast Tarrant County.

The agency is also involved in the operation of the Trinity Railway Express (TRE) commuter rail line between from downtown Fort Worth and downtown Dallas in partnership with Dallas Area Rapid Transit and the North Texas Xpress (Route 64) express bus service in partnership with Denton County Transportation Authority.

[10] In 2001, the FWTA saw its cooperation efforts with DART pay off as the Trinity Railway Express reached downtown Fort Worth.

[14] As of the FWTA 2015 master plan, citing "project costs and other considerations", the agency decided to build the 27 mile Minimum Operable Segment (MOS) between downtown Fort Worth and DFW Terminal B.

The other considerations likely included stalled negotiations with Fort Worth & Western, Union Pacific, and DART, over securing right of way for TEXRail trains.

The three potential stations were conditional on either city joining the Trinity Metro service area, which requires imposing a half-cent sales tax to help fund the agency.

[17] On January 29, 2018, the transit agency's board of directors voted to rebrand FWTA/The T as Trinity Metro, and revealed a new logo, that depicts three triangles forming the letter "M" in its negative spaces.

[18][19] Full member cities of Trinity Metro are required to levy a 1⁄2¢ sales tax to pay for the system.

For example, Grapevine and North Richland Hills made agreements in 2006 and 2016, respectively, to obtain stations on the then-planned TEXRail line.

TEXRail, opened in 2018, is a hybrid rail service connecting downtown Fort Worth and DFW Airport.

From 2019 to 2024, Trinity Metro operated The Dash, a shuttle route which connected Fort Worth Central station to the Cultural District and Dickies Arena using red-colored electric buses.

Users check out electric bikes from docking stations across Fort Worth and ride them for the duration set according to pass purchased.

[43] The service is open to riders in eleven counties: Dallas, Ellis, Erath, Hood, Johnson, Navarro, Palo Pinto, Parker, Somervell, Tarrant, and Wise.

The service allows eligible patrons to schedule curb-to-curb transportation to any location in Fort Worth or River Oaks.