Trinity Railway Express

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**Trinity Railway Express (TRE)**

Locale	Dallas/Fort Worth Metroplex
Transit type	Regional rail
Began operation	1996
No. of lines	1
No. of stations	10
Track gauge	1,435 mm (4 ft 8½ in) (standard gauge)
Operator	Herzog Transit Services (under contract to Dallas Area Rapid Transit and Fort Worth Transportation Authority)

The Trinity Railway Express (or TRE) is a Regional rail line in the system of mass transit in Dallas and Fort Worth operated by an interlocal agreement between the Dallas Area Rapid Transit (DART) system and Fort Worth Transportation Authority (The T) in Fort Worth. The Trinity Railway Express is named after the Trinity River, which flows between Fort Worth and Dallas.

This Trinity Railway Express (TRE) locomotive (ex-GO Transit) was caught at the Fort Worth, Texas Amtrak Station, in early 2006.

Until 2006, it 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, which will run from Pleasant Grove to Carrollton. Thus, the TRE is now shown as a dark blue line on DART maps.

The eastern terminus of the line in Dallas is at Union Station on the west side of downtown Dallas. The line runs northwest, past the American Airlines Center, through Irving, DFW Airport, Hurst, Richland Hills before finally ending at the T&P Station on Throckmorton Street in downtown Fort Worth.

The TRE was launched shortly after the inaugural service of Dallas' light rail system in 1996, operating from Union Station to the South Irving Station in Irving. On 18 September 2000, the line was extended to the Richland Hills Station and for the first time, there was rail service available between downtown Dallas and DFW Airport. On 13 November 2000 the West Irving Station also opened.

On 3 December 2001, the TRE was extended to its current terminus at T&P Station in downtown Fort Worth.

Equipment used on the TRE consists mainly of EMD F59PHI locomotives and Bombardier BiLevel Coaches identical to GO Transit, Metrolink and Caltrain commuter trains. Rail diesel cars (RDCs) are used in the midday periods mostly for trains between downtown Dallas and DFW Airport.