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Want Safer Streets For Everyone? Narrow The Lanes

Turns out, wider lanes don’t make for safer streets. In a new study from the Johns Hopkins Bloomberg School of Public Health, a team of researchers found that the opposite is actually true: Narrowing lanes at certain speeds could save lives. The study came from a simple observation, says lead researcher Shima Hamidi, a transportation planner and Hopkins assistant professor of American health. She noticed that the traffic lanes in U.S. cities were much wider than their counterparts in other countries. Without existing data, traffic engineers assumed that wider lanes — which left more room for driver error — would be safer.
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