My small village just went 20 mph. I am happy to be proven wrong but it has resulted in more problems and traffic. As you have to crawl past the parked cars on the narrow streets it takes ever longer to get through. This means people waiting longer in the little gaps, more "pushing" to force through gaps in streams. In general the previously polite town traffic is becoming rather irate around school time. So they accelerate harder through the gaps. That worked well then....
