American interstate and highway signs illustration including highway 101 and interstate 95. | CanStock
NYSDOT on Twitter: "Do you know what type of road you're driving on? The details on route designation signs let you know if it's a county, state, U.S. or interstate route. https://t.co/uql39mHNdQ" /
File:I-5.svg - Wikimedia Commons
M1-1 Interstate Route Sign (1 or 2 digits) - Hall Signs