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Updates on G Line 

  • Published
  • Updated
  • by City Manager

 UPDATE July 20, 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. Starting July 20, 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

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.

Who to Contact



Power lines along the G Line (Gold Line) are turned on. These wires hold 25,000 volts of electricity and can be extremely dangerous. RTD asks everyone to please stay away from the tracks and the wires, and never try to touch or throw anything at them. Trespassing in active work zones is illegal and can be dangerous.