https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12290865Edit ImageSaveSaveEditCropCustom TextChicago, Illinois. Uncoupling cars as they go over the hump at an Illinois Central Railroad yard. Sourced from the Library of Congress.View public domain image source hereMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 1146 x 1200 px | 300 dpiLarge JPEG 3344 x 3500 px | 300 dpiBest Quality JPEG 4820 x 5045 px | 300 dpiTIFF 4820 x 5045 px | 300 dpi | 46.41 MBFree DownloadChicago, Illinois. Uncoupling cars as they go over the hump at an Illinois Central Railroad yard. Sourced from the Library of Congress.More