 On June 30 of that year, the first stretch of the "Fenton–Clio Expressway" opened.Construction on the Chrysler Freeway in Detroit started on January 30, 1959.The I-75 signs were first installed along the Detroit–Toledo Expressway in October 1959, replacing US 24A signage in the Monroe area, after the state waited for final approval of the numbering system to be used in the state.