Companies that operate delivery fleets in metropolitan areas are discovering that they just happen own one of the hottest commodities in the advertising industry — the sides of their trucks.

A truckside-mobile billboard council has formed in response to the rapidly growing popularity of truckside and mobile-billboard advertising.

Companies that operate delivery trucks in metropolitan areas own one of the hottest commodities in the advertising industry — a commodity so hot that some of the country’s largest advertisers, such as McDonald’s and Frito-Lay, have jumped on the bandwagon.