RTD 4033 (Hyundai P3 Eagle) passes by the Union Pacific's North Yard at sunrise

RTD 4051 (Hyundai Eagle P3) drops down off the elevated track adjacent to the BNSF engine servicing facility.

RTD commuter train 4025 (Hyundai Eagle P3) takes the elevated section of track that runs past some new apartments and the BNSF engine servicing yard in Denver, Colorado.

RTD commuter train 4041 runs past a water tower at sunrise in Denver, Colorado.

RTD 4048 (Hyundai Eagle P3) runs towards Denver International Airport and will soon deliver another train load of passengers from Union Station in downtown Denver, Colorado.

RTD 4037 (Hyundai Eagle) arrives in lower downtown Denver as it passes the BNSF engine servicing facility.

RTD commuter train 4044 runs towards Arvada, Colorado at sunrise.

RTD commuter rail train 4033 (Hyundai Eagle) runs on the elevated track over the BNSF engine facility and heads towards Thornton, 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.

RTD 4031 (Hyundai Eagle P3) runs past the Union Pacific's North Yard in Denver, Colorado.

RTD 4047 (Hyundai Eagle P3) runs at Denver's Union Station, past Amtrak's 'Bumblebee 203', which carries the colorful Operation Lifesaver 50th Anniversary markings.

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 4033 passes an old water tower as it runs the elevated track along the Union Pacific's North Yard in Denver, Colorado.

RTD commuter train 4026 (Hyundai Eagle P3) runs on the elevated section of track past the UP's North Yard at dawn.

Two RTD commuter trains are in the Denver Union Station and will soon take passengers to the four corners of the Denver Metro Area.