Interstate 80
I-80 is the Interstate Highway that most closely approximates the route of the historic Lincoln Highway, the first road across the United States. The highway roughly traces other historically significant travel routes in the Western United States: the Oregon Trail across Wyoming and Nebraska, the California Trail across most of Nevada and California, the first transcontinental airmail route, and except in the Great Salt Lake area, the entire route of the First Transcontinental Railroad. From near Chicago east to near Youngstown, Ohio, I-80 is a toll road, containing the majority of both the Indiana Toll Road and the Ohio Turnpike. I-80 runs concurrently with I-90 from near Portage, Indiana, to Elyria, Ohio. In Pennsylvania, I-80 is known as the Keystone Shortway, a non-tolled freeway that crosses rural north-central portions of the state on the way to New Jersey and New York City.
Jefferson Davis Highway
Although it may not be possible to view the entire length of the highway on a map today, many parts of it still exist, scattered across the country. This is an incomplete listing of some of the places today where one can see pieces of the Jefferson Davis highway.The Jefferson Davis Highway traverses through the state for . Starting at the Virginia state line along US 15 to Sanford; then on US 1 from Sanford to the South Carolina state line. Designation of highway was approved on May 28, 1955.