The Green Line is a 28.6 miles (46 km) light rail

Light rail

Light rail or light rail transit is a form of urban rail public transportation that generally has a lower capacity and lower speed than heavy rail and metro systems, but higher capacity and higher speed than traditional street-running tram systems...

 line in Dallas

Dallas, Texas

Dallas is the third-largest city in Texas and the ninth-largest in the United States. The Dallas-Fort Worth Metroplex is the largest metropolitan area in the South and fourth-largest metropolitan area in the United States...

, USA, operated by the Dallas Area Rapid Transit

Dallas Area Rapid Transit

The Dallas Area Rapid Transit authority is a transit agency based in Dallas, Texas . It operates buses, light rail, commuter rail, and high-occupancy vehicle lanes in Dallas and 12 of its suburbs...

 authority (DART). The US$

United States dollar

The United States dollar , also referred to as the American dollar, is the official currency of the United States of America. It is divided into 100 smaller units called cents or pennies....

1.7 billion project opened in phases, starting in 2009. It operates in addition to the and lines currently in service, and will be joined by the Orange

Orange Line (Dallas Area Rapid Transit)

The Orange Line will be a 14 mile mass transit light rail line in Dallas, Texas operated by the Dallas Area Rapid Transit system. It will operate in addition to the currently existing , and lines...

 line in 2012.

It began operation on September 14, 2009 with a route from downtown Dallas

Downtown Dallas

Downtown Dallas is the Central Business District in Dallas, Texas USA, located in the geographic center of the city. The area termed "Downtown" has traditionally been defined as bounded by the downtown freeway loop: bounded on the east by I-345 Downtown Dallas is the Central Business District...

 southeast to Fair Park

Fair Park

Dallas Fair Park is a recreational and educational complex located in Dallas, Texas . The complex is registered as a Dallas Landmark, National Historic Landmark and is home to nine museums, six performance facilities, a lagoon, and the largest Ferris wheel in North America...

; this short route was scheduled to open in time to service the 2009 State Fair of Texas

State Fair of Texas

The State Fair of Texas is an annual state fair held in Dallas, Texas . The fair season usually begins the last Friday in September and ends 24 days later. The fair is held at the historic Fair Park where it has been held since 1886. The 2012 State Fair of Texas will run from September 28th...

.