Agreed, having a minimum speed sign on a stroad is just begging for pedestrian deaths. It would be such an obvious liability that nobody in charge of transportation would allow it.
Every municipality has a minimum speed limit so you can’t just have someone driving 1km/h down the road creating a rolling blockade. Most are posted on the entrance into the municipality.
There are reasons for both sides to have and not have specific laws.
Where are these municipalities?
These are US signs and this isn’t a thing anywhere that I have traveled to across the US other than the 40 minimum on some interstates and highways.
Every municipality has some form of minimum speed law, do you want me to list every single one? You even provide an example of places they are used… and want to argue they don’t exist…? What?
Can you provide an example of a place without any minimum speed laws?
Where I’m from it’s just 20 less than the max. Conditions apply but that’s because they reduce the max
I’m a traffic engineer and I’ve literally never heard of such a thing (except on freeways).
In Georgia it’s illegal to travel 15 or more under the posted speed limit, including on non interstate roads, unless otherwise posted.
Edit: getting downvoted for saying facts about my state. Yall are weird