That highway was extended in the 1930s to replace the original M-151.
The highway was extended and improved several times through 1938.
The highway was extended again in 1961, this time to the west.
The highway was extended to Oxford in the late 1920s.
The highway was extended west to Exit 4 by 1971.
The highway was originally designed in the 1930s and extended a few years later.
This highway was extended east by the middle of 1936.
By 1947, the highway had been extended west to Iowa 14.
The highway was then extended back into downtown Detroit in the first year of the 21st century.
The highway was gradually extended to its present length between then and 1960.
