Tags: Railway Line.
The D Line—also referred to as the Green Line because green is the line’s color on maps—is a light rail line which is part of the light rail system operated by the Regional Transportation District in the Denver-Aurora Metropolitan Area in Colorado. The D line was the first line in the system when it opened in 1994 traveling from downtown Denver to I-25 and Broadway as the Central Corridor. It was extended along the Southwest Corridor in July 2000.