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Mini-roundabouts are sometimes grouped in pairs (a double mini-roundabout) or in "chains", simplifying navigation of otherwise awkward junctions. In some countries road signs distinguish mini-roundabouts from larger ones. Mini-roundabouts are common in the UK, Ireland and Hong Kong (particularly on Hong Kong Island), as well as Irapuato in Mexico.
At four-legged intersections within Europe, a roundabout or mini-roundabout may be used to assign a relative priority to each approach. (Roundabouts remain rare in North America, where early failures of rotaries and traffic circles caused such designs to lose favor until the gradual introduction of the modern roundabout in the late 20th century.)
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 distinction based on certain differences in size and engineering).
Terminology related to road transport—the transport of passengers or goods on paved (or otherwise improved) routes between places—is diverse, with variation between dialects of English. There may also be regional differences within a single country, and some terms differ based on the side of the road traffic drives on. This glossary is an ...
A regular circular roundabout around 240 feet in diameter was proposed in 2005, but in 2008 the dogbone roundabout was chosen to minimize impacts on existing properties and structures.
Marohn distinguishes between roads that are designed for mobility which he terms "roads" and those that function to "build a place", build community wealth and provide access to land. He argues the value of a road in terms of both community wealth and mobility is maximised when the road speed is either low or high, but not at midpoints such as ...
French sign showing the difference between French and Swiss motorway sign colours, on the A411 near Geneva. The main differences relate to Graphic design details; Local regulatory significance; The colour-coding of directional signs; Local language texts (sometimes bilingual) The meaning and colour-coding of horizontal road surface markings
A roundabout interchange is a type of interchange between a controlled access highway, such as a motorway or freeway, and a minor road. The slip roads to and from the motorway carriageways converge at a single roundabout , which is grade-separated from the motorway lanes with bridges.