 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 three @-@ quarters mile ( 1 @.@ 2 km ) apart . From the interchanges to the Story County line one and three @-@ quarters miles ( 2 @.@ 8 km ) 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 . 
