A traffic circle is an intersection with a circular shape and, usually, a central island. New Jersey ( is a state in the Mid-Atlantic and Northeastern regions of the United States. A road junction is a location where vehicular Traffic going in different directions can proceed in a controlled manner designed to minimize accidents In some traffic circles two-way traffic is allowed within the circle. It is much more common, however, that traffic is allowed to go in one direction only around a central island. Traditionally, traffic entering a circle has the right-of-way, although some circles give right-of-way to the primary roads. Traffic on Roads may consist of Pedestrians ridden or herded Animals Vehicles Streetcars and other Conveyances either singly In roundabouts, as opposed to traffic circles, entering traffic must yield to traffic already in the circulatory roadway. A roundabout is a type of Road junction at which Traffic enters a one-way stream around a central island
French architect Eugène Hénard was designing one-way circular intersections as early as 1877. Year 1877 ( MDCCCLXXVII) was a Common year starting on Monday (link will display the full calendar of the Gregorian calendar (or a Common American architect William Phelps Eno favored small traffic circles. William Phelps Eno (1858-1945 was an American businessman responsible for many of the earliest innovations in Road safety and traffic control He designed New York City's famous Columbus Circle, which was built in 1905. Columbus Circle, named for Christopher Columbus, is a major landmark and point of attraction in the New York City borough of Manhattan. Year 1905 ( MCMV) was a Common year starting on Sunday (link will display full calendar of the Gregorian calendar (or a Common year starting Other traffic circles were subsequently built in the United States. Many were large diameter 'rotaries' that enabled high speed merge and weave, and gave priority to the traffic entering the circle. These designs were doomed to failure for two primary reasons:
The experience with traffic circles in the US was almost entirely negative, characterized by high accident rates and congestion problems. By the mid 1950s, construction of traffic circles had ceased entirely. The experience with traffic circles in other countries was not much better until the development of the modern roundabout in the United Kingdom during the 1960s. A roundabout is a type of Road junction at which Traffic enters a one-way stream around a central island
Among the most famous traffic circles in the world is that of Canberra, Australia, where a large traffic circle encircles Parliament House. Canberra ( is the capital city of Australia With a population of over 340000 it is Australia's largest inland City. For a topic outline on this subject see List of basic Australia topics. Parliament House is the meeting place of the Parliament of Australia. This circle has traffic lights at each major intersection within the circle.
The largest traffic circle in the world is claimed to be one of those in the Dammam coastal road, Al-Khaleej Street, in Saudi Arabia with a length of approximately 1. Dammam (Also Ad Dammām) (الدمام is the Capital of the Eastern Province in Saudi Arabia. The Kingdom of Saudi Arabia, KSA ( المملكة العربية السعودية, al-Mamlaka al-ʻArabiyya as-Suʻūdiyya) or Suudi 20 miles.
Traffic circles are often composed of concrete or asphalt although more recently rubber curbing is being used to create traffic circles as well, primarily in residential areas. Rubber curbing consists of units of flexible rubber that are bent and installed around a landscaped area to create traffic circles.