A Policy on Geometric Design of Highways and Streets, 2011 |
Common terms and phrases
AASHTO accommodate adjacent alignment American Association angle approach appropriate arterial streets auxiliary lane barrier bicycle capacity centerline clearance climbing lanes cloverleaf interchange collector collector-distributor roads corner island crash cross section cross slope cross streets crossroad curb curb ramp curvature deceleration design speed design vehicle desirable diamond interchange drainage drivers driveways edge exit facilities Federal Highway Administration freeway frontage roads grade separation Highway and Transportation intersecting roads islands km/h left-turn lanes length level of service located major road maneuver maximum median openings median width multilane MUTCD needed number of lanes parking passenger cars passing sight distance pavement pedestrian percent practical radii radius ramp terminals reduce right-of-way right-turn roadway width roundabout rural shown in Figure side friction sidewalks sight triangle signal stopping sight distance structure superelevation rate Table tangent taper traffic volumes transition Transportation Officials traveled trucks Turning Path turning roadway Typical vertical curves