https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12291072Edit ImageSaveSaveEditCropCustom TextMake it Yours.Remix, add effects & personalize with your own textCustomizeOr start from these designsFreight operations on the Chicago and Northwestern Railroad between Chicago and Clinton, Iowa. The rear brakeman signals the engineer to test the brakes by applying and releasing them. This is the signal for "apply". Sourced from the Library of Congress.MoreFreight operations on the Chicago and Northwestern Railroad between Chicago and Clinton, Iowa. The rear brakeman signals the engineer to test the brakes by applying and releasing them. This is the signal for "apply". 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 1200 x 956 px | 300 dpiLarge JPEG 3500 x 2787 px | 300 dpiBest Quality JPEG 4096 x 3262 px | 300 dpiTIFF 4096 x 3262 px | 300 dpi | 12.74 MBFree Download