A new study by the AAA Foundation for Traffic Safety has found that increasing the speed limit on highways could result in more crashes on local roads. This “spillover” is one of the possible unintended consequences of a seemingly minor change.
AAA wanted to see if increasing highway speeds also caused drivers to “adopt risky speeding behaviors on local streets.” As part of this effort, researchers examined crash data before and after speed limit increases on interstates in Georgia, Michigan, and Oregon.
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