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Before-and-after study of the safety benefits of medians
A new study by Florida International University's Lehman Center for Transportation Research and the Florida Department of Transportation evaluates the safety impact of converting two-way left-turn medians to raised medians. Eighteen locations totaling 17.51 miles were selected for before-and-after analysis.
Study results indicate a 30.3 percent reduction in the total crash rate after conversion to a raised median and a 28.9 percent reduction in pedestrian crash rate.