Two realignments in 1963 and 1964 rerouted the western end of the highway again . This time it was realigned to run from Hesperia to New Era , bypassing Ferry . A larger change around 1969 reconfigured the highway designations in Oceana County . M @-@ 20 replaced M @-@ 82 west of Hesperia , to end at New Era instead of Muskegon . The new M @-@ 120 designation replaced M @-@ 20 south of Hesperia . M @-@ 82 now ran from Hesperia to Newaygo 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 Casnovia . This freed up the Newaygo 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 Fremont , resulting in the current highway routing .