RTD to operate A Line service at 30-minute frequency Oct. 3-29 during repairs to Dahlia Street crossing

RTD will operate all A Line service at a 30-minute frequency, seven days a week, beginning Monday, Oct. 3, and continuing through Saturday, Oct. 29 while repairs are made to the railroad crossing at the intersection of Dahlia Street and Smith Road. 


The A Line normally serves stations every 15 minutes, but RTD will change that frequency to every 30 minutes as trains operate on a single track around the work zone. Regular, 15-minute service on the A Line is scheduled to resume Sunday, Oct. 30.

Trains will pass workers and equipment on or near the tracks at the Dahlia Street crossing Monday through Saturday during working hours, which begin at 7 a.m. and continue through 3 a.m. the following day. As a safety precaution, train horns will sound through the Dahlia Street crossing during working hours.

Repairs are expected to provide a long-term fix that improves the way trains operate through this section of rail.

During initial work, customers will board A Line trains on Track 1 at 38th•Blake and 40th•Colorado stations. Check station platform signs or visit RTD’s Service Disruptions page for more information.

Helpful tips:

  • Customers and Denver Airport employees are encouraged to plan ahead if their trips are affected by the schedule adjustment.
  • Customers can view the adapted A Line schedule at RTD’s Service Disruptions page.
  • Use RTD’s Trip Planner and Next Ride web apps to plan your trip and see train and bus locations in real time.
  • For the latest details about service, follow RTD on Twitter (@rideRTD) and sign up for Service Alerts.
  • For additional route and schedule information, call RTD’s Customer Care division at 303.299.6000. Agents are available 6 a.m.-6 p.m. on weekdays, and 9 a.m.-6 p.m. on Saturdays.