D Line (RTD)
| D Line | |||
|---|---|---|---|
 | |||
 D Line at Convention Center station | |||
| Overview | |||
| Status | Discontinued | ||
| Owner | Regional Transportation District | ||
| Locale | Denver metropolitan area | ||
| Termini | |||
| Stations | 12 | ||
| Service | |||
| Type | Light rail | ||
| System | RTD Rail | ||
| Operator | Regional Transportation District | ||
| Ridership | 2,666,000 (FY2023, annual) | ||
| History | |||
| Opened | October 7, 1994 | ||
| Closed | June 7, 2026 | ||
| Technical | |||
| Track gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge | ||
| Electrification | Overhead line, 750 V DC | ||
| |||
The D Line was a light rail line operated by the Regional Transportation District in the Denver–Aurora Metropolitan Area in Colorado. It operated from 1994 until 2026.
It was the first line in the system when it opened, traveling from Denver's Five Points neighborhood through downtown Denver and terminating at I-25 & Broadway. It was extended along the Southwest Corridor to Littleton in 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 in 2002. During this time, it was designated internally as Route 101.
The D Line was eliminated in 2026, as a part of two separate RTD service changes which re-configured service on the Southwest Corridor.