Testing of crossing gates on RTD’s A Line between Union Station and Central Park Station will require riders to use shuttle buses all day Wednesday, Aug. 21, between 7 a.m. and 5 p.m.

The testing is required by federal rules. The Union Pacific Railroad and Denver Transit Operators will be performing maintenance and testing at Steele Street, Holly Street, and Clayton Street.

A Line trains will operate on their regular schedule between Central Park Station and Denver International Airport.

Passengers can access bus shuttle service at the following locations:

• Union Station, Gate B22 (underground bus concourse)

• 38th•Blake Station, board shuttle in front of the station

• 40th•Colorado Station, Gate B

• Central Park Station, Gate B3

Rail service will resume after the work is completed.

Continuous service to DIA is scheduled to depart Union Station at approximately 5:00 p.m.

Continuous service from DIA to Union Station is expected to depart at approximately 4:42 p.m.

Customers are encouraged to plan ahead and prepare for extra time for bus shuttle transfers to or from the airport.

For more information, visit RTD’s Service Disruptions page and use the agency’s Next Ride web app to plan your trip, view other options and receive Service Alerts.