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G Line Transit Corridor

  • Published
  • Updated
  • by City Manager

 UPDATE August, 2018 – The Regional Transportation District (RTD) has received approval from the Federal Railroad Administration to begin the next phase of testing on the G Line. Testing is ramping up and will soon simulate the full daily service schedule of nearly 21 consecutive hours each day. During the next few months, the public will see an increase in the number of trains running each day and should be alert for trains on the tracks at any time, coming from either direction. During the testing, train horns will be sounding.  Read full RTD press release

Want to know more? View RTD's G Line FAQs.

Want to speak with someone about the train horns? 
Please call RTD's customer service line at 303-299-6000 or leave a comment electronically at

Train Horns and Quite Zones

  • Federal law requires that the train and its warning devices (horns) be tested per Federal safety guidelines.  If these guidelines are not followed, the G Line will not be put into passenger service.  The City has no jurisdiction over this and Federal law supersedes the City's noise ordinance.
  • The City of Arvada submitted the Notices of Intent to establish Quiet Zones in 2015.  There will be no delay on the City's part in establishing the Zones once we are given permission to proceed from RTD and the Public Utilities Commission.
  • If you would like to speak with someone about train horns, call RTD's customer service line at 303-299-6000 or leave a comment electronically at
  • Information regarding the Federal Railroad Administration (FRA) rules regarding testing of train horns can be found at (search "train horns")

Safety Tips

  • Never trespass on any train track — it is illegal and dangerous.
  • Cross the tracks only at designated crossings, always follow safety signage and obey warning devices like flashing red lights and gate arms.
  • Stay alert and look both ways for a train — you may not hear them coming.
  • Stay off station platforms until they are open to the public.

For after-hour emergencies, please call 303-299-3911. For additional information, please contact RTD at 303-299-6000 or visit

More Information

To read RTD's news alert, visit For more information about the G Line, please visit To read general messaging regarding Train horns and quiet zones, download the RTD PDF.

G Line Overview

The G Line is part of RTD’s 2004 voter-approved FasTracks plan to expand transit across the Denver metro region  Read the 2016 RTD FasTracks Fact Sheet (PDF) and is part of a larger project called the Eagle P3 project which includes the East Corridor transit line to Denver International Airport. The G Line is an 11.2-mile electric commuter rail transit line that will connect Denver Union Station to Wheat Ridge, passing through northwest Denver, Adams County and Arvada. There are eight stations: Denver Union Station, 41st/Fox, Pecos, Federal, Gold Strike, Olde Town Arvada, Arvada Ridge and Ward Road. 

For information regardng the status of the G Line opening, please visit