Median Intersection Design for Rural High-speed Divided Highways
This 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 advance intersection annual crash frequency at-grade intersections Chapter conﬁguration conﬂict points countermeasure Crash Frequency/Year crash rate Crash Rate/mev crash types crossing maneuvers design guidance divided highway intersections expressway drivers expressway inter expressway trafﬁc far-side ﬁrst freeway gap selection grade separation guide signs I-turn intersection identiﬁed installed interchange intersection design intersection-related Iowa jughandle intersections left-tum left-turn leaving 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 reduced right-angle crashes roadway rumble strips rural expressway intersections safety beneﬁts safety effectiveness shown in Figure sideswipe sight distance speciﬁc STAs STOP sign strategy Table trafﬁc control trafﬁc stream trafﬁc volumes two-lane TWSC expressway intersections TWSC intersections TWSC rural expressway YIELD signs