https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12290866Edit 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 1142 x 1200 px | 300 dpiLarge JPEG 3332 x 3500 px | 300 dpiBest Quality JPEG 4786 x 5028 px | 300 dpiTIFF 4786 x 5028 px | 300 dpi | 45.92 MBFree DownloadChicago, Illinois. Uncoupling cars as they go over the hump at an Illinois Central Railroad yard. Sourced from the Library of Congress.More