Michigan State Route 78 runs east-west briefly in Southwestern Eaton County. It runs from Interstate 69, west to the Eaton/Barry County Line. MI St Rt 78 passes through the following town in Eaton County. Bellevue
MI St Rt 78 is not multi-plexed in Eaton County. MI St Rt 78 intersects the following highway in Eaton County. Interstate 69, near Olivet.
WB MI St Rt 78 south of Capital Avenue. EB MI St Rt 78 east of Bellvue. WB MI St Rt 78 east of Bellvue. WB MI St Rt 78 west of I-69. A BGS on NB I-69. A BGS on SB I-69. A BGS on NB I-69. A WB guide marker. The eastern begin point. (November, 2025) The eastern begin marker. (November, 2025) The eastern end marker. The eastern end of MI St Rt 78. (November, 2025) The eastern end marker. (November, 2025)
