This is a Facebook page for MoDOT (Missouri Department of Transportation), formerly The Missouri Highway Department. There are innumerable old pix there showing highways, which have many old cars & trucks in them. Do you have any links to other sites that are full of old car pix.
This link has pictures from a Billboard Co. in the Trenton, NJ area, mostly from the 1940s. Lots of good cars in the background, like a '33 Willys and a '40 Ford Woody. https://library.duke.edu/digitalcollections/rcmaxwellco/Subject/Business & Technology