There used to be 14 head-on collisions and two deaths on San Francisco’s Golden Gate Bridge every year. In 2015, the authorities installed a central barrier and traffic deaths fell to zero.
Why not install a median barrier on all roads in America? The answer is it would cost too much. The decision about where to put safety features, says Bjorn Lomborg, the Danish political scientist and high priest of cost-benefit analysis, reveals society’s willingness to pay for an extra life. In…
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