Wikipedia
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. Because it was the first and only line in the system it had no letter or color designation until the Central Platte Valley Spur opened on April 5, 2002, although on maps it was designated as Route 101.
Usage examples of "d line".
She'd line up three or four fun kids, hire a cook and a maid, stock up with steaks and champagne and offer weekend excursions for the tired businessman at a thousand dollars a head.
If they'd line up and we'd line up and they came at us, we could clobber them.