That is 100% correct. If you build a 50 MPH road through a neighborhood, you're going to get 50 MPH traffic through a neighborhood. What the signs say is irre

That is 100% correct. If you build a 50 MPH road through a neighborhood, you're going to get 50 MPH traffic through a neighborhood. What the signs say is irrelevant unless there's a cop right there. If you want slow traffic, build slow roads. Likewise, if you build your house on a fast road, don't expect traffic to slow down just because your kids are there.