RTD commuter train #4019 (Hyundai Eagle) takes the high track past a variety of motors in the Denver BNSF yard.

RTD 4029 (Hyundai P3 Eagle) leads the A-Line commuter train towards Denver International Airport.

The Rocky Mountains are covered in snow as RTD commuter train 4019 runs from Westminster to Denver.

RTD 4019 runs past a crane crew unloading large pipes in the yard of the BNSF engine servicing facility.

A colorful RTD commuter train drops down from the elevation section of track that goes by the BNSF engine servicing facility.

The RTD commuter rail service between Denver International Airport and Denver's Union Station, dubbed 'The Train to the Plane', is now up and running.