 As a part of these responsibilities, the department tracks the volume of traffic that uses the highway.In 2009, MDOT's surveys showed that the volume along M-64 was 3,333 vehicles daily, on average on the Ontonagon River Bridge; the lowest traffic was between US 2 and the Gogebic–Ontonagon county line at 418 vehicles per day.The only segments of the trunkline that have been included on the National Highway System (NHS) are the US 2 and M-28 concurrencies.