What are the most effective traffic calming measures?

Answer 1

Traffic calming refers to slowing down speeders. One method commonly used is posting the driver's speed as detected by radar often closely juxtaposed to a sign stating the legal limit. Speed bumps have become ubiquitous especially near schools. A roundabout is an elegant solution to 'naturally' slow down speeders. Of course, the presence of a visible police care is probably the most effective method.