The signs I was thinking of were those that stated Minimum 45 MPH on US highways. I think that also went along with the general rule that if you were driving under 45 on the highway you should have your warning flasher lights active.
Probably not, since some U.S. states do post minimum (fair-weather) speeds on Interstate highways. Section 2.2 of this paper includes a slightly dated map indicating the minimum speeds in each state (where applicable).
Could you be thinking of Canadian speed limit signs, which say “maximum”?
I wasn’t but have seen those as well.
The signs I was thinking of were those that stated Minimum 45 MPH on US highways. I think that also went along with the general rule that if you were driving under 45 on the highway you should have your warning flasher lights active.
Sorry, I actually just misread your post as saying “maximum” where you wrote “minimum”.
Probably not, since some U.S. states do post minimum (fair-weather) speeds on Interstate highways. Section 2.2 of this paper includes a slightly dated map indicating the minimum speeds in each state (where applicable).
I actually just completely misread my parents post and thought they wrote “maximum” and not “minimum”.