North of the river, the roadway is bounded by businesses as it runs along Cooper Street through residential areas on the southeastern side of Jackson.

Northbound traffic continues along the eastern side of this loop on Cooper Street and crosses the Grand River again.

On the western side of downtown, the business loop angles southwesterly as Louis Glick Highway merges into Michigan Avenue.

[6][7] The eastern end was updated further in 1968 to use Louis Glick Highway to connect to the northern half of the loop around downtown to Michigan Avenue.

[8][9] A set of connector streets on the western side of the downtown loop opened in November 1969 to streamline the flow of traffic further resulting in the last changes to the BL I-94 routing in Jackson.

Louis Glick Highway was extended west from Blackstone curving south to merge into Michigan.

It started at an intersection on the southern edge of the city where US 127 split from Hull Road to bypass downtown Mason to the west.

At that time, the bypass around Mason was upgraded to a full freeway with an interchange at Cedar Street northwest of downtown.

The trunkline starts at an intersection with Business Loop Interstate 96 (BL I-96) at the corner of Cedar and North streets in the northern part of the city.

US 127 continues through suburban southern Clinton County, still bordered by businesses and residential neighborhoods, northward to an interchange with I-69 in DeWitt Township.

US 27 was truncated to the interchange between BL I-96/Capitol Loop and I-496, and the state reconfigured it into a business spur into downtown Lansing from the north.

US 127 interchange north of St. Johns, the US 127 freeway merges back onto its former alignment to proceed northerly into Gratiot County.

North of town, the business loop passes a golf course before turning eastward a short distance along Polk Road to connect to the freeway.

US 127 crosses the Pine River and runs through residential neighborhoods on the eastern side of Alma before entering the downtown area.

North of downtown, the business loop crosses another residential area before passed the hospital and more commercial properties.

At the intersection with M-46 (Washington Street), the business loop turns westerly along the other highway, running concurrently.

[31][45] An expressway through Gratiot County opened in late 1961, and US 27 was rerouted to follow it, bypassing St. Louis to the west.

US 127 runs to the west as a four-lane divided highway parallel to tracks of the Great Lakes Central Railroad.

[46][48] Near the south end of the city's commercial strip in the township, the two directions of the business loop merge as an undivided highway and follow Mission Street.

North of Corporate Way in Union Township, the business loop leaves Mission Street and returns to a divided highway, veering northeasterly to connect to exit 144on US 127.

[1] In early 1961, a divided highway section for US 27 was opened in Gratiot and Isabella counties; this routing connected into the former US 27 alignment south of Mount Pleasant at Mission Street.

A new divided highway connector on the north end of town was built to complete the business route.

[50][51] In 2002, when US 127 replaced US 27 north of Lansing, the Mount Pleasant business loop was given its current moniker to match.

US 10 passes through a residential area on the north side of the city and crosses the South Branch of the Tobacco River.

Route 10 in Michigan, it follows Clare Avenue past several businesses before terminating at a full interchange with the freeway.

The southern end starts at exit 170 on US 127 and runs concurrently northwesterly and northward along M-61 through rural woodland away from the freeway.

The business loop passes through the unincorporated community of Allendale as Park Street and turns northwesterly near the southern end of Budd Lake.

At the intersection with Main Street, M-61 separates to the west, and the business loop continues northwesterly parallel to the shore of Budd Lake.

North of town, the business loop runs through the unincorporated community of Ash Acres in Hayes Township before passing the Clare County Airport.

[31][55] An expressway through Clare County opened in late 1961, and US 27 was rerouted to follow it, bypassing Harrison to the east.