interstate iowa interstate mile auxiliary interstate highway located eastern iowa route extends interstate near connects cities sixth largest cities state respectively miles north route runs concurrent iowa highway represents iowa portion mile avenue connecting missouri minnesota construction took years complete ending interstate opened moved new freeway 1990s corridor selected avenue saints corridor iowa designated iowa highway affected major floods great flood iowa flood closed road weeks route description interstate begins cloverleaf interchange cross interstate interchange iowa route assigned avenue saints highway iowa run interstate heads north serves freeway runs parallel routing iowa highways cross crossing routes enter city limits near miles north airport intersects interchange interchange splits away iowa freeway elevated relative nearby streets residential neighborhoods approaches downtown freeway takes tight degree turn east crosses river plant turning degrees north downtown 29th street interchange serves dividing line residential areas east industry west north end industry replaced commerce iowa meet iowa locally known collins road interchange collector distributor ramps collins road serve function north freeway leaves enters interchange diamond quickly escaping area turns northwest passes predominantly rural areas small communities farms way northwestern angle enters counties miles counties iowa generally rectangular shape passes northwestern northeastern meets iowa southwestern interstate travels heading northwest miles turning north miles directional interchange travel west routes pass eastern suburbs immediately crossing splits away iowa level stack interchange head north east crossroads center shopping mall half mile north interchange serves crossroads center ends traffic light mitchell avenue continues north point history section opened traffic september section connected years interstate extended bridge crossed river open june end continuous road interchange interstate originally scheduled open christmas weather delays pushed construction section completed opened september bypassed iowa city joining interchange replaced iowa early 1990s designated avenue saints corridor connects missouri minnesota avenue saints route markers erected route year august avenue saints iowa given single designation iowa facilitate following route state crosses iowa major rivers iowa cedar rivers affected interstate major floods case great flood iowa closed reservoir july july roads reopened lake waters allow check bridges water great iowa flood affected section fashion iowa closed june july flooding close bridge close traffic restricted city flooding damage severe iowa city feet june causing hundreds millions dollars damage exit list
Interstate 380 (Iowa)