We live in a society where more is generally considered better. We want improved fuel economy from our cars, more data from our phones and a better picture from TVs. But when it comes to engineering some roads, giving drivers more room might not actually be an advantage. There's some evidence that switching from the current 12-foot standard for lanes to 10-foot-wide lanes for urban streets could boost safety. The change might potentially mean around 900 fewer fatal crashes each year.
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