An increasing number of states are banning billboards along highways. Travelers do need a low tech method for finding certain services though, such as food, lodging, fuel and restrooms. So you’ll see those blue signs that says “FOOD NEXT EXIT” with a Waffle House and Burger King logo. In order to put the logo on that sign, the business has to meet certain criteria (which vary from state to state like all highway laws), for example a restaurant must be within 3 miles of the highway, be open for at least 12 hours a day and feature public restrooms and telephones. The sign itself may include a distinctive logo and the name of the business in legible font but no slogans or ad copy. “This burger restaurant is nearby.”
This I see as an appropriate amount of advertising.