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  2. 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.

  3. Roundabout - Wikipedia

    en.wikipedia.org/wiki/Roundabout

    The Hotel Indonesia Roundabout in Jakarta, Indonesia A roundabout in Kent, UK on the A13 highway near Sadlers Farm. 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.

  4. 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) of available space required for that vehicle to make a semi-circular U-turn without skidding.

  5. Intersection (road) - Wikipedia

    en.wikipedia.org/wiki/Intersection_(road)

    A traffic circle is a type of intersection at which traffic streams are directed around a circle. Types of traffic circles include roundabouts, "mini-roundabouts", "rotaries", "STOP"-controlled circles, and signal-controlled circles. Some people consider roundabouts to be a distinct type of intersection from traffic circles (with the ...

  6. Types of road - Wikipedia

    en.wikipedia.org/wiki/Types_of_road

    Asphalt road in Norway. A road is a thoroughfare, route, or way on land between two places that has been surfaced or otherwise improved to allow travel by foot or some form of conveyance, including a motor vehicle, cart, bicycle, or horse.

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  8. Driveway - Wikipedia

    en.wikipedia.org/wiki/Driveway

    A driveway (also called drive in UK English) [1] is a private road for local access to one or a small group of structures owned and maintained by an individual or group. Driveways rarely have traffic lights , but some may if they handle heavy traffic, especially those leading to commercial businesses or parks.

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