M-157 is a shortcut between M-55 and M-18, located just to the east of Prudenville. At 1.1 miles, M-157 is the fourth-shortest Michigan state route.
The following shots of M-157's endpoints were taken by Brian Reynolds on May 11, 2002.
This is M-157's southern terminus at M-55.
Below is the directional guide sign seen in the background of the previous picture, along with the subsequent intersection with M-55. Note that the destination for eastbound M-55 traffic is I-75: when M-55 hits I-75, it multiplexes with I-75 for 12 miles before arriving in West Branch.
Here is a shot of M-157's northern terminus at M-18.
And, likewise, below is the directional guide sign corresponding to the last picture, and the subsequent intersection with M-18.