women's restrooms, payphones with TDD capabilities, weather reporting kiosks, vending machines, and free wireless internet. Many stations have family restrooms and dump stations for recreational vehicles. The first rest areas along Iowa's Interstates were built in the 1960s. They were modest facilities; separate buildings housed the restrooms and vending machines. A few rest stops had another building with local tourist information. On August 4, 1999, the first modern rest area opened along eastbound I-80 near Wilton. The new facilities feature one large building housing as many as 28 more toilets than the older buildings, in addition to all the other common rest area amenities. They also feature artwork by local Iowa artists. Each new rest area is designed around a theme. For instance, the facility near Adair is a tribute to the life of Henry A. Wallace, the 33rd Vice President of the United States, who was born in nearby Orient. History Since before the Iowa Primary Highway System was created in 1920, the Council Bluffs-to-Davenport, by way of Des Moines, corridor has always been important. Two roughly parallel auto trails, the Great White Way and the River-to-River Road, served cross-state traffic. The two routes were merged into one route, the Whiteway Highway, in 1922. Four years later, the Whiteway Highway would become US 32. The US 32 designation was absorbed into an extended US 6 in 1931. Previously, US 6 had existed only in the Northeastern United States. Within 10 years, US 6 was the most-traveled road in Iowa, with an average of "1,920 cars a day at any given rural point". Iowa Turnpike In 1954, Coverdale & Colpitts, a New York City-based engineering firm working on behalf of the Iowa State Highway Commission, reported on the feasibility of building an east–west toll road, to be called the Iowa Turnpike, across the state. The firm found that the turnpike should closely parallel US 6 between Council Bluffs and Davenport. They concluded that the turnpike could be economically possible if $180 million (equivalent to $ in ) in revenue bonds were issued at interest rates no higher than 3.5 percent. In early March 1955, the Iowa General Assembly debated the pros and cons on building a toll road. Proponents of the turnpike said it would be a self-financing project. The feasibility report suggested tolls of (equivalent to in ). It was estimated that, in 1953, the turnpike could have generated