Median Intersection Design for Rural High-speed Divided HighwaysThis report describes common safety issues at median intersections on rural divided highways and presents innovative geometric and operational treatments for addressing those issues. Ten case studies illustrate how they have been applied in the field. The report includes recommendations for modifications to the AASHTO A Policy on Geometric Design of Highways and Streets (Green Book) and the Manual on Uniform Traffic Control Devices (MUTCD). |
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AASHTO Green Book acceleration lane annual crash frequency at-grade intersections Chapter conflict points countermeasure Crash Frequency/Year crash rate Crash Rate/mev crash types crossing maneuvers design guidance divided highway intersections expressway drivers expressway intersection safety expressway traffic far-side freeway frontage roads gap selection grade separation guide signs installed interchange intersection crash intersection design Iowa J-turn intersection jughandle intersections left-turn leaving left-turn vehicles located mainline MALS median opening median U-turn median width minor road approaches minor road drivers minor road traffic MnDOT MODOT MUTCD NCDOT NCHRP Report offset left-turn lanes offset right-turn lane offset T-intersection opposing left-turn pavement markings ramp rear-end crashes reduced roadway rumble strips rural expressway intersections safety effectiveness shown in Figure sight distance STAS STOP sign strategy Table tapered Traffic Control traffic stream traffic volumes treatments turn lanes two-lane TWSC expressway intersections TWSC intersections TWSC rural expressway warning signs