High Quality Content by WIKIPEDIA articles! MetroLink (reporting mark BSDA) is the light rail transit system in the Greater St. Louis area of Missouri and Illinois. The entire system currently consists of two lines (Red Line and Blue Line) connecting Lambert-St. Louis International Airport and Shrewsbury, MO with Scott Air Force Base near Shiloh, Illinois through downtown St. Louis. The system features 37 stations and carries an average of 61,573 people each weekday. There have been over $15 billion worth of transit oriented developments near the system since it opened in 1993. A second line, the "Cross-County Extension," now known as the Blue Line, opened to the public August 26, 2006 (2006-08-26). This 8-mile (12.9 km), 9-station line connects Washington University, Clayton, the popular Saint Louis Galleria shopping center and Shrewsbury to the system. Further extensions are under study, but no alignments have yet been chosen, engineered or funded. MetroLink is operated by the Bi-State Development Agency, which since 2003 is doing business as Metro.