A Policy on Arterial Highways in Urban Areas
American Association of State Highway Officials, 1957 - Roads - 558 pages
The 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 chapter clearance cloverleaf cloverleaf interchange collector-distributor roads construction cross section cross slope cross streets curve 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 layout left turns length major streets maneuver median lane minimum necessary normally number of lanes offset outer separation overcrossing parallel ramps parking lanes passenger pattern peak hours percent permit preferably radii ramp terminals reverse-flow right turns route running speed shown in figure side sight distance signal control space structure superelevation surface tion traffic lanes traffic signals traffic volumes trucks turning movements turning traffic turnout U-turns urban areas urban arterial highways viaduct weaving