It is a busy day at Denver International Airport as a RTD commuter train with four cars runs past the BNSF engine facility in downtown Denver, Colorado.

RTD commuter rail train 4030 (Hyndai Eagle P3) heads out of Union Station as the passenger cars on the UP Big Boy special back into downtown.

With a massive thunderstorm cell looming in the background, RTD 4030 (Hyundai Eagle) runs on the commuter rail line linking Denver International Airport with downtown Denver.

RTD Commuter Train 4030 (Hyundai Eagle P3) gets ready to pull into the terminal at Denver International Airport.

Train time at Denver Union Station
A RTD A Line commuter train is about to depart for the airport, as Amtrak’s westbound California Zephyr makes its morning station stop at Denver, Co... (more)