By Randal O’Toole and Kathleen Calongne
A recent paper purporting to show that speed humps make residential streets safer for children actually shows nothing of the kind. In fact, the study’s data can even be interpreted to mean that humps make streets more dangerous.
Speed humps are annoying and potentially dangerous to drivers and can cause deadly delays to emergency service vehicles. But an Oakland, Calif., study (seehttp://www.ajph.org/cgi/content/abstract/94/4/646
) claims to show that speed humps make streets 50 to 60 percent safer for children.
The study used a database showing when and where 1,600 speed humps were installed on Oakland streets between 1995 and 2000. Ideally, the researchers would have compared accident rates on those streets before the speed…