Safety of U-Turns at Unsignalized Median Openings (2004) / Chapter Skim
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Pages 79-80
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From page 79... ...
at a directional midblock median opening is typically only about 14 percent of the median opening accident rate for a directional median opening at a threeleg intersection. • For urban arterial corridors, average median opening accident rates are slightly lower for conventional three-leg median openings than for conventional four-leg median openings • For urban arterial corridors, average median opening accident rates for directional three-leg median openings are about 48 percent lower than the accident rates for conventional three-leg median openings.
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From page 80... ...
• When evaluating the safety performance of unsignalized median openings, highway agencies should take into account both U-turn and left-turn maneuvers because accident report data do not distinguish clearly between accidents involving U-turn maneuvers and those involving left-turn maneuvers. • Median widths at suburban unsignalized intersections generally should be as narrow as possible while providing sufficient space in the median for the appropriate left-turn treatment and to accommodate U-turn maneuvers by a selected design vehicle.
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