 Two <unk> in 1963 and 1964 rerouted the western end of the highway again . This time it was realigned to run from <unk> to New Era , bypassing Ferry . A larger change around 1969 <unk> the highway designations in <unk> County . M @-@ 20 replaced M @-@ 82 west of <unk> , to end at New Era instead of <unk> . The new M @-@ 120 designation replaced M @-@ 20 south of <unk> . M @-@ 82 now ran from <unk> to <unk> only . The length of the highway was increased in 1973 when the eastern end was moved back to Howard City . M @-@ 46 was rerouted to follow the US 131 freeway south of Howard City to Cedar Springs , and replaced M @-@ 57 between Cedar Springs and <unk> . This freed up the <unk> to Howard City highway for a return to the M @-@ 82 designation . The last change came in 1978 when the concurrency with M @-@ 120 was eliminated in favor of M @-@ 120 . The M @-@ 82 designation was truncated at this time to the junction west of <unk> , resulting in the current highway routing . 
