Michigan Highway 152 is a spur from Michigan Highway 51 west to the Sister Lakes area of southwestern Michigan. More specifically, the eastern end of Michigan Highway 152 occurs at a point along Michigan Highway 51 that's southwest of Decatur, yet north of Dowagiac. Michigan Highway 152 heads westerly, jogs northerly, then continues westerly into the Sister Lakes area. Michigan Highway 152 abruptly reaches its western end at the county line between Van Buren and Berrien Counties; this puts the western extent of Michigan Highway 152 in Van Buren County. Most of the route, south and east of the jog, is in Cass County. The roadway occupied by Michigan Highway 152's westernmost segment continues west as Napier Avenue, which has an interchange with Interstate 94 in Benton Harbor.
My photo of Michigan Highway 152 signage shows the northbound junction marker along Michigan Highway 51. This is at the eastern end of Michigan Highway 152 north of Dowagiac. This signage is posted south of the junction of Highways 51 and 152, so that northbound travelers on Michigan Highway 51 learn that the turn onto Michigan Highway 152 is just ahead. This photo was taken in April 2018 on a quick trip to the southwest corner of Michigan. Yes, that snow on the ground is that of an early April day.