Burlington's Denver Zephyr surprised me while I was waiting for the mail train in the background (shown in image 354169). It came out of nowhere and was by me in a flash. It had to be hitting at least 80mph as it passed me headed for downtown Chicago on the CB&Q racetrack. This location was probably a little east of Congress Park, Il.
Although BN spent just 14 months as a passenger carrier, it maintained the high standards of Burlington's Denver Zephyr, Great Northern's Empire Builder and Northern Pacific's North Coast Limited.