Trinity Railway Express

Trinity Railway Express
Trinity Railway Express
	EMD F59PH at Dallas Union Station in November 2004
Overview
Owner	Dallas Area Rapid Transit (50%); Trinity Metro (50%)
Locale	Dallas–Fort Worth metroplex
Termini	Union Station, Dallas; T&P Station, Fort Worth;
Stations	10
Website	trinityrailwayexpress.org
Service
Type	Commuter rail
Operator	Herzog Transit Services
Daily ridership	6,700 (weekdays, Q2 2026)
Ridership	1,337,600 (2025)
History
Opened	December 30, 1996
Technical
Line length	34 mi (55 km)
Track gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Route map
Route map
	TEXRail
	to DFW Airport Terminal B
	Tarrant County
	Dallas County
	to North Carrollton/Frankford
	to DFW Airport Terminal A
	to Parker Road
	to Downtown Rowlett
	to Westmoreland
	to UNT Dallas
	All stations are accessible

The Trinity Railway Express (TRE; reporting mark TRWX) is a commuter rail service in the Dallas–Fort Worth metroplex, Texas, United States. It was established by an interlocal agreement between Dallas Area Rapid Transit (DART) and Trinity Metro. Each transit authority owns a 50% stake in the joint rail project and contractor Herzog Transit Services operates the line. The TRE began operating in December 1996.

In 2025, the system had a ridership of 1,337,600, or about 6,700 per weekday as of the second quarter of 2026, making it the seventeenth most-ridden commuter rail system in the United States.

Before 2006, the TRE was typically shown as a green line on DART maps and therefore was sometimes referred to as the "Green Line," but this was not an official designation. In 2006, DART chose green as the color for its new light rail route, the Green Line. Since 2006, the TRE has been shown as a dark blue line on DART maps.