Quad-City Times: The Iowa 80 Truckstop, hailed as the world’s largest truckstop, is getting even bigger. Construction is underway on a $10 million expansion and remodeling project at the Walcott truckstop, owned by the Iowa 80 Group. The expansion will add 23,000 square feet to the already 100,000-square-foot main building. It will create a larger convenience store, additional retail space and relocate and expand the food court.