I was traveling through Georgia last week, going from Montgomery to St. Simons Island and highway markers along the way designated the road as Jefferson Davis Highway. When I got home I looked it up on wikipedia and it stated the following
"The Jefferson Davis Memorial Highway was a planned transcontinental highway in the U.S. in the 1910s and 1920s that began in Washington D.C., and extended south and west to San Diego, CA. It was named for Jefferson Davis, who, in addition to being the first and only President of the Confederate States of America was also a U.S. Congressman and Secretary of War".
It never really existed as planned, but parts of it are scattered across the country, and a portion of it is still in Georgia, where I drove on it last week, State Road 32, near Irwinville, where he was captured.