The freeway continues east and descends into the Mississippi River valley. Two exits provide access to downtown Burlington. The interchange for CR X99 sits at the foot of the Great River Bridge. The highway crosses the bridge and enters Illinois. The Iowa 163 designation ends on the bridge at the state line. History What is now the US 34 corridor has been used, under various names, for over 100 years. The route was first organized as the Blue Grass Route in 1910 during the height of the Good Roads Movement. Then, the road was maintained by the Iowa Blue Grass Road Association, which solicited donations from people who lived along the route. Ten years later, the Iowa General Assembly passed a primary road bill which shifted the responsibility of road maintenance from associations to Iowa's 99 counties. At the same time, route numbers were applied to the new primary highway system; the Blue Grass Route was designated Primary Road No. 8. In 1925, confusion between route associations and nascent state highway systems led to the creation of the U.S. Highway System. Primary Road No. 8 was replaced by U.S. Highway 34 the next year. Paving of the highway was completed in 1930; US 34 was the first road in Iowa to be paved in its entirety. Work on modernizing Iowa's highway system began in the 1950s, mostly by straightening and widening the original highways built in the 1930s. By the end of the 1950s and into the 1960s, sections of US 34 were identified as parts of important corridors that required expansion to four lanes. Construction on the eastern and western sides of the state, in Burlington and Glenwood, respectively, did result in parts of the highway becoming four lanes; other highway projects were cut back during the 1970s recession. At Glenwood, the discovery and handling of Native American remains led to the Native American Graves Protection and Repatriation Act. In the mid-1990s, the Iowa Department of Transportation began an ambitious project to expand seven important corridors, one of which connected Des Moines to Burlington. The portion of US 34 between Ottumwa and Burlington was finished in 2008 when the bypass of Fairfield opened. At both state line crossings, modern bridges capable of handling four-lane, high-speed traffic were built to replace old and obsolete truss bridges. The Great River Bridge over the Mississippi River opened in Burlington in 1994 and