S.R. 55 & 73rd Ave Intersection Improvement in Lake County (Des 1383615) INDOT About INDOT Central Office Welcome to the LaPorte District Current: S.R. 55 & 73rd Ave Intersection Improvement in Lake County (Des 1383615) This page covers the S.R. 55 & 73rd Ave Intersection Improvement in Lake County.Project DocumentFinal Enviromental DocumentationNotice of Project AdvancementNotice of Public HearingProject PlansEnviromental DocumentsPublic Hearing Welcome LetterPublic Comment SheetPublic Hearing AgendaProposed Roundabout ExhibitPublic Hearing Presentation Slides