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University of Colorado A Line


Current construction list and detour maps


Opening day is April 22


The University of Colorado A Line is a 22.8-mile commuter rail transit corridor that will operate between Denver Union Station and Denver International Airport. The rail line will connect these two important areas while serving adjacent employment centers, neighborhoods and development areas in Denver and Aurora. The University of Colorado A Line is being constructed as part of RTD's fully funded Eagle P3 Project.

Testing of the University of Colorado A Line underway

Full testing of the CU A Line is underway. Please be alert for possible delays at crossings along the line. Additionally, construction continues on the A Line so be aware of changing conditions, lane restrictions or road closures.

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Airport Transit Center

Testing of bus operations at the new Airport Transit Center is taking place. It opens in conjunction with the University of Colorado A Line from Denver Union Station to the airport. Testing with radios, automatic vehicle tagging and maneuverability show that the systems are all functioning properly.

Starting April 24th, the public will no longer go to Level 5, West Terminal to catch RTD buses, but will instead go to the new transit center located under the new Westin Hotel to the south of the main terminal area.

University of Colorado A Line map

RTD's new commuter rail trains will operate on the CU A Line.

East Rail Line map June 2015
Click here for a larger version of the map


CU A Line key links

See the A Line fact sheet

Catch up on what's new with the A Line

View an interactive map of the A Line and its stations

Take a virtual tour of the A Line

Read the current monthly University of Colorado A Line construction newsletter

Read the current Eagle P3 Project quarterly newsletter

How to do business with the East Rail Line

Contact us for more information

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