CEDAR RAPIDS (AP) ? Cable barriers installed along stretches of Iowa?s interstates are helping to prevent crashes by stopping cars from crossing the median into oncoming traffic, authorities said.The barriers began going up about two years ago, and police and highway officials told The Gazette hat they are paying off.?I think they?ve made a tremendous difference,? said Coralville Police Lt. Shane Kron. ?It?s an ...

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