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.

40 is an example of the minimum on the interstate highway.

A relative of mine rear ended someone and couldn't understand why they were at fault for the accident. Just kept saying the person in front of them just stopped out of nowhere and there was nothing they could do.

People just don't realize they're supposed to give that much distance to the person in front of them. You're supposed to be able to stop without hitting the person in front of you if they, for any reason, stop without warning.

In my area the driving manual only discusses stopping/following distances for the commercial drivers license, not the standard drivers license

30 mph is almost 50 km/h. In most of Europe the default maximum speed limit inside of populated areas is 50 km/h.

Default meaning artillery roads like this one can and almost always do have higher limits than 50, but the defsult maximum suddenly becoming the minimum makes no sense.

A road that isn't physically barricaded from foot trafic akin to a highway has no reason to have a minimum speed limit over 15 mph (30 km/h), if at all.

30mph (48kmh) is the minimum, cars will also be going faster than that. Also, people need to cross the street, not just walk alongside it. Regardless, whether drivers or pedestrians are the issue, accidents happen. They are more likely to happen, and more likely to be fatal as vehicle speed increases.

From the Institute for Road Safety Research, page 2:
"According to an overview of recent studies (Rósen et al., 2011): at a collision speed of 20 km/h nearly all pedestrians survive a crash with a passenger car; about 90% survive at a collision speed of 40 km/h, at a collision speed of 80 km/h the number of survivors is less than 50%, and at a collision speed of 100 km/h only 10% of the pedestrians survive."

Areas with minimum speeds of 30mph in areas with pedestrians accept that at least 1 in 10 will die. This is easily reduced to negligible fatalities by having lower speed limits. Not doing so says we care more about saving some of the drivers' time than the lives of pedestrians.

Here in Germany, the Autobahn has a minimum speed cars need to be able to go (60 kph) although it’s not a minimum speed you necessarily need to drive.

However, we do have a dedicated minimum speed sign, but it’s very rare and usually only used in very specific places. The only one I know is a long and windy bridge on the side of a small mountain where, depending on your lane, you need to go at least 60, 80 or 90, I think.

WHERE

Ok Usain.