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For the knee to be useful you have to go below it -- thus 15 mph is a much better neighborhood and school speed limit.
by scienceman 1y ago
For the knee to be useful you have to go below it -- thus 15 mph is a much better neighborhood and school speed limit.
- hyperman1 1y agoTo add a data point. In Belgium, the max speed around schools is enforced to be 30 km/h. That should be a bit less than 20mph.