Board Thread:Writer's Workshop/@comment-33488654-20180903163712/@comment-33488654-20180904221548

There, I did some quick research.

It turns out the first state wide legislation on speed limits was in 1965, which had a daytime speed limit of 65 mph, and a nighttime speed of 55 mph.

https://www.clickondetroit.com/traffic/a-brief-history-of-michigans-speed-limits

This be the site, btw.