The following terms have the meanings indicated. Terms Defined. “Administration” means the State Highway Administration. “Business” means the provider of one of the four services (gas, food, lodging, and camping). “Drive-in” means a food business that provides stalls for which customers in vehicles can park, order, and eat food. “Expressway” means a major highway of two or more traffic lanes in each direction that is designed to eliminate principle traffic hazards and has the following characteristics: A median divider separating opposing traffic lanes to eliminate head-on collisions and side-swiping; Grade separation structures to eliminate the conflict of cross streams of traffic at each intersection; Points of entrance and exit limited to predetermined locations; Vertical curves long enough to provide long sight distances; and Shoulders wide enough to permit vehicles to stop or park out of traffic lanes. “Generic motorist services symbols” means blue signs upon which white symbols are placed to indicate the presence of gas, food, lodging, or camping. “Gore” means the point at which the ramp roadway leaves the mainline roadway. “Logos” means the individual business trademarks. “Mainline” means the through roadway of the highway. “Ramp” means the connecting roadway between the mainline and the intersected road. “Services” means the four basic motorist services of gas, food, lodging, and camping. “Stall” means a clearly defined space for parking a vehicle.