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  2. Roundabout - Wikipedia

    en.wikipedia.org/wiki/Roundabout

    A roundabout, a rotary and a traffic circle are types of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junction. [1][2] In the USA, engineers use the term modern roundabout to refer to junctions installed after 1960 ...

  3. Geometric design of roads - Wikipedia

    en.wikipedia.org/wiki/Geometric_design_of_roads

    Circular curves are defined by radius (tightness) and deflection angle (extent). The design of a horizontal curve entails the determination of a minimum radius (based on speed limit), curve length, and objects obstructing the view of the driver. [4] Using AASHTO standards, an engineer works to design a road that is safe and comfortable.

  4. Curb cut - Wikipedia

    en.wikipedia.org/wiki/Curb_cut

    A pram ramp with tactile paving that connects an off-street walking trail to a road. A curb cut (U.S.), curb ramp, depressed curb, dropped kerb (UK), pram ramp, or kerb ramp (Australia) is a solid (usually concrete) ramp graded down from the top surface of a sidewalk to the surface of an adjoining street. It is designed primarily for pedestrian ...

  5. Glossary of road transport terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_road_transport...

    A city or location posted on a series of traffic signs along a particular stretch of road indicating destinations on that route. Controlled-access highway, motorway, or freeway. A type of highway which has been designed for high-speed vehicular traffic, with all traffic flow and ingress/egress regulated. The corduroy.

  6. Jefferson Memorial - Wikipedia

    en.wikipedia.org/wiki/Jefferson_Memorial

    Landscape architect Frederick Law Olmsted Jr. designed the memorial landscape, which featured a simple design within a circular driveway including primarily Evergreen trees with limited flowering trees or shrubs. The design was perceived as too thin, so white pines and some other plantings were later added before the memorial's dedication in ...

  7. Turning radius - Wikipedia

    en.wikipedia.org/wiki/Turning_radius

    Diagram showing the path of a driver performing a U-turn.A vehicle with a smaller turning diameter will be able to perform a sharper U-turn. The turning radius (alternatively, turning diameter or turning circle) of a vehicle defines the minimum dimension (typically the radius or diameter, respectively) of available space required for that vehicle to make a semi-circular U-turn without skidding.

  8. North Lawn - Wikipedia

    en.wikipedia.org/wiki/North_Lawn

    A semicircular driveway runs from the northwest gate through the North Portico, sweeping back to Pennsylvania Avenue through the northeast gate. [1] A circular pool with fountain is centered on the north portico of the White House. Visiting heads of state enter the White House grounds, and are officially welcomed here prior to a state dinner ...

  9. Road verge - Wikipedia

    en.wikipedia.org/wiki/Road_verge

    A road verge is a strip of groundcover consisting of grass or garden plants, and sometimes also shrubs and trees, located between a roadway and a sidewalk. [1] Verges are known by dozens of other names such as grass strip, nature strip, curb strip, or park strip, the usage of which is often quite regional.

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