The Interstate Highway System
I-94 CORRIDOR in MICHIGAN
The first major overland transportation corridors in the future state of Michigan were the Indian foot trails. One of these, the St. Joseph Trail, followed the general route of the modern I-94 across the state from the Benton Harbor - St. Joseph area east to the Ann Arbor area.

The first segments of the future route of I-94 were created during World War II to provide improved access to Ford's Willow Run bomber plants and extended eastward as the Detroit Industrial Expressway into Detroit; completed in March 1945.The interchange between the Lodge Freeway and the Edsel Ford Freeway was built in 1953 as the first full freeway-to-freeway interchange in the United States. See 2017 image Below.

In 1940, a southern bypass of Battle Creek, becoming Business US 12. In late 1951 a northerly bypass of Jackson opened. In 1954, a new bypass of Kalamazoo and Galesburg opened. The first planning maps from 1947 was included on the 1955 plan for the "National System of Interstate and Defense Highways". In January 1959, officials announced that the city by-pass sections were to be given the I-94 designation. Later that year, additional segments of I-94 were opened.

In 1960, sections of freeway opened between Jackson and Ann Arbor. In this year, Michigan became the first state to complete a border-to-border toll-free Interstate within their state, running for 205 miles (330 km).  https://en.wikipedia.org/wiki/Interstate_94_in_Michigan
My encounters with I-94 did not occur until the 1960 construction with my traveling from Temperance to Fennville. The map below displays all that were worth mentioning from 1956, on. This was especially so when working in the Homer - Tekonsha area. MARSHALL & HOMER stories are linked on the map.
The FIRST - FREEWAY TO FREEWAY INTERCHANGE
Was completed in 1953, the year I graduated from High School and joined the Navy. :)