Lamar Advertising is a real estate investment trust and an outdoor advertising company. Co. leases space for advertising on billboards, buses, shelters, benches, logo plates and in airport terminals. Co.'s outdoor advertising displays are: billboards, in which Co. leases its advertising space on bulletins and posters; logo signs, which erects logo signs that advertise nearby gas, food, camping, lodging and other attractions, and directional signs that direct vehicle traffic to nearby services and tourist attractions, near highway exits; and transit advertising displays, in which Co. rents transit advertising displays in airport terminals and on bus shelters, benches and buses.