It served as a business route running for 9.010 miles (14.500 km) through the Newberry area.

The business loop followed a U-shaped routing to connect downtown Newberry with M-28 south of town.

It ran west of the city of Newberry, passing through the community of Dollarville before entering downtown, turning south and ending near the county airport.

The trunkline was partially turned back to local control in 1953, and the business loop designation was removed at that time.

The section of the roadway in downtown Newberry has carried several different designations in addition to the original M-28.

The highway ran due north from the intersection along Engadine Road, running downhill towards Teaspoon Creek.

[7] M-28 was transferred to a new roadway south of Newberry in late 1935 or early 1936 as shown on the Michigan State Highway Department (MSHD) maps of the time.

The April 15, 1953 MSHD map shows the highway turned back to local control.

[3][5] Later in 1953, M-117 was shown rerouted due south of Newberry, avoiding the jog along Webber and Miller roads.