8.US Route 6
Length of highway: 3,019 miles (4,860 kilometers)
One of the integral parts of the US Highway system, US Route 6 runs from California to Massachusetts, and was once the longest highway in the country in 1964.
Length of highway: 3,019 miles (4,860 kilometers)
One of the integral parts of the US Highway system, US Route 6 runs from California to Massachusetts, and was once the longest highway in the country in 1964.