Traffic is filtered into Ames and Iowa State University (ISU) from US 30 through five interchanges. On the outskirts of Ames are the Lincoln Way interchanges, access to and from Lincoln Way is handled by two half interchanges apart. From the interchanges to the Story County line away, Lincoln Way is designated as Iowa 930, but is never signed as such. The South Dakota Avenue interchange primarily serves the southwestern part of Ames. The University Boulevard (formerly Elwood Drive) exit provides access to the Iowa State University campus and Iowa State Center, ISU's cultural and athletics complex. The Duff Avenue interchange provides access to Ames's east side. US 69 and Interstate 35 Business Loop are designated along Duff Avenue. From Duff to I-35, US 30 is overlapped by the I-35 Business Loop. Between the Duff and Dayton Avenue interchanges, it crosses the South Skunk River. The Dayton Avenue interchange serves hotels and restaurants and is a travel stop for I-35 travelers.