RCW 47.42.055: Roadside area information panels or displays.

The department is authorized to erect roadside area information panels or displays adjacent to the state highway system within this state. The department may contract with private persons for the erection and operation of the information panels or displays. Compensation to the contractors shall be derived solely from the reasonable fees that the contractors will be permitted to charge participating businesses for making and exhibiting business signs and displays and for rendering services to tourists.