exit south of Grinnell, the farmland that surrounds the Interstate undulates. Just south of Malcom, it meets US 63. Further east, at exit 201 for Iowa 21, there are competing truck stops on either side of the freeway. A hotel is located on the northern side. Eastern Iowa Now in Iowa County, I-80 continues toward the eastern end of the stretch of straight highway. It turns slightly to the southeast near the Ladora exit and straightens again at the Marengo interchange, where Kinze Manufacturing, a farm implement manufacturer, advertises its business to passing travelers by arranging farm implements into sculptures. A few miles east, in Williamsburg, is the northern end of Iowa 149. The Williamsburg exit is the location of a Tanger Outlet Mall. The next interchange marks the southern end of US 151. Both the Iowa 149 and US 151 interchanges serve the Amana Colonies which are located to the north. As I-80 enters the Iowa City area, the speed limit drops to . On the edge of Coralville is an interchange with US 218 and Iowa 27. This interchange is also the beginning of I-380, which heads north along US 218 and Iowa 27 toward Cedar Rapids and Waterloo. The I-80/I-380 interchange was identified as the most likely location in Iowa for a semi-trailer truck to overturn. According to the American Transportation Research Institute, 30 trucks rolled over at the interchange during the eight-year study period. The Iowa Department of Transportation (Iowa DOT) has plans to replace the cloverleaf interchange with a turbine interchange, but the project would not take place until around 2025. At the I-380 interchange, I-80 becomes a six-lane freeway. The Coral Ridge Avenue exit provides access to US 6, which passes beneath the Interstate just before the interchange, and the eponymous shopping center located to the southeast. The 1st Avenue exit in Coralville and Dubuque Street exit in Iowa City direct University of Iowa traffic to different parts of the university campus. The Iowa River flows between the two interchanges and also marks the boundary between Coralville and Iowa City. On Iowa City's east side are the Iowa 1 and Herbert Hoover Highway exits. Between them, the highway drops back to four lanes and the speed limit increases to . As it enters Cedar County, it passes West Branch, the birthplace of and site of the library and museum of President Herbert Hoover. It