A Policy on Arterial Highways in Urban AreasThe Committee on Planning and Design Policies was organized in 1937 upon authority of the Executive Committee of the Association. The purpose of the committee is the formulation of administrative policies looking toward the incorporation in practice of highway design features which will result in maximum safety and utility. |
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accommodate adjacent arrangement at-grade expressways auxiliary lanes barrier curbs bus stops bus turnout buses central business district clearance cloverleaf cloverleaf interchange collector-distributor roads construction cross section cross slope cross streets crosswalks curve D max depressed freeways design capacity design speed desirable desire lines diamond interchange direction drivers edge elevated freeway existing streets exit expressways at grade facility feasible feet wide Geometric Design Policy grade separation improvement intersections lateral ramps left turns length major streets maneuver median lane minimum necessary normally number of lanes offset outer separation overcrossing parallel ramps parking lanes passenger pattern pavement peak hours percent preferably radii ramp terminals reverse-flow right turns route running speed shown in figure sight distance signal control space structure superelevation Surface Street tion traffic lanes traffic signals traffic volumes trucks turning movements turning traffic turnout U-turns urban areas urban arterial highways viaduct