The R Line is and will continue running the full route between Peoria and Lincoln, however it will see limited service in the evenings throughout the rest of the project.

In August 2007, night, Saturday, Sunday and holiday service on this route was discontinued due to low ridership.

Construction began in spring 2012 on a short section of the line as part of a joint contract with the Colorado Department of Transportation.

Following an unsolicited proposal from Kiewit Infrastructure Company, funding was secured for the full line, which was expected to open in winter 2016.

[8] Regional Transportation District sent four teams a Request for Proposal for the Southeast Corridor extension, consisting of 2.3 miles (3.7 km) of new track south of Lincoln station that would serve three new stations: Sky Ridge Medical Center, Lone Tree City Center, and the terminus at RidgeGate Parkway.