Commuter train RTD 4066 gets the green light to enter Denver's Union Station to drop off passengers it collected from Denver International Airport.

Coming and going. A commuter train leaves Denver's Union Station for Westminster as another arrives from Denver International Airport. Steely eyed foamers will also notice the California Zephyr ... (more)

A commuter train prepares to head downtown from the Denver Airport

A commuter train prepares to leave Denver's magnificent station as Zephyr passengers board out of site.

Commuter train RTD 4024 makes a run on the B line between Denver's Union Station and Westminster, Colorado.

Slowly RTD is 'wrapping' their commuter trains with bright colors of advertisers.

RTD commuter train 4008 (Hyundai Eagle P3) leaves Denver Union Station on the B Line for Westminster, Colorado. Hiding behind the many catenary lines is the morning California Zephyr waiting to ... (more)

The 'Plane to the Train' commuter rail line connects Denver International Airport with Denver Union Station. Its a great and quick way to see Denver if your flying into DIA and staying downtown.

RTD's commuter train flies over a freight that has just left the Denver Yard

Saddle up! Workers board the Hyundai Eagle P3 commuter train #4007 that has just been turned on the wye near the BNSF engine servicing facility. The BNSF will then help push the cars to Denver's ... (more)

RTD 4017 (Hyundai Eagle P3) is one of the fast commuter rail trains that run between Denver International Airport and Denver's downtown Union Station. This week the 'A-Line' experienced a fatalit... (more)

The "Train to the Plane" commuter rail train heads to Denver's Union Station, passing a UP unit waiting to push a load of autoracks out of the 36th Street Yard.

RTD Commuter train 4026 arrives at Denver Union Station from Denver International Airport, while red signals hold outbound cars.

It is the blue hour and the sunrise is just starting to cast a glow over the Denver skyline as RTD commuter train 4011 heads north on the B line towards Westminster, Colorado.

RTD commuter train 4007 leaves two Amtrak trains behind as it departs Denver's Union Station and heads to Westminster.