Comment by mlyle

The schools I'm thinking of have sidewalks with some degree of protection/offset from street, and the crossings are protected by human crossing guards during times when students are going to schools. The posted limits are "25 (MPH) When Children Are Present" and traffic generally moves at 20MPH during most of those times.

There are definitely times and situation where the right speed is 7MPH and even that feels "fast", though, too.