Interstate Highway designation in Michigan
... that the newest Interstate Highway designation in Michigan is Interstate 73, but it has never been built?
... that the newest <b id="mwB-Y"><a href="./List_of_Interstate_Highways_in_Michigan" id="mwB-c" rel="mw:WikiLink" title="List of Interstate Highways in Michigan">Interstate Highway designation in Michigan</a></b> is <a href="./Interstate_73" id="mwB-g" rel="mw:WikiLink" title="Interstate 73">Interstate 73</a>, but it has never been built?