Lamar Advertising Company, based in Baton Rouge, Louisiana, is a provider of billboards, transit advertising, and highway logo signs. Founded in 1902, Lamar currently operates over 150 outdoor advertising companies in more than 40 states and Puerto Rico. Lamar has over 70 transit franchises across the United States, Canada and Puerto Rico which maintain billboards, digital signs, and advertising on buses, bus stops, and benches. Lamar is also the leading provider of highway signs in North America, with operations in 19 states and the province of Ontario, Canada. It has been the largest outdoor advertising company in the United States and Puerto Rico since 1999.  Wikipedia