Drive across country in the American West and you'll find: McDonalds, Dairy Queen, Starbucks, Wal*Mart.
Truck stops, ubiquitous on the interstates, always have the same stuff, usually a Subway or similar fast-food chain, food and beverages on the aisles just like any city. Some but not much regional variation, usually manifest by something like the variety of Doritos flavors available. Inside the only way you can tell where you are is to look for the always-present postcard and souvenir racks.
Truck stops, ubiquitous on the interstates, always have the same stuff, usually a Subway or similar fast-food chain, food and beverages on the aisles just like any city. Some but not much regional variation, usually manifest by something like the variety of Doritos flavors available. Inside the only way you can tell where you are is to look for the always-present postcard and souvenir racks.