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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.
A major signal-controlled roundabout interchange in central Bristol, England. Vehicles drive on the left, and vehicles in the roundabout are stopped by traffic lights to allow other vehicles to enter, while an underpass permits straight-through traffic to bypass the roundabout entirely.
The turbine interchange is an alternative four-way directional interchange. The turbine interchange requires fewer levels (usually two or three) while retaining directional ramps throughout. It features right-exit, left-turning ramps that sweep around the center of the interchange in a clockwise spiral. A full turbine interchange features a ...
Here's what you need to know about the interchange: A roundabout is a type of intersection. There are no traffic lights, and drivers enter the circle and drive counter-clockwise around the circle ...
A three-level diamond interchange is a type of highway interchange where through traffic on both main roads is grade-separated from intersections which handle transferring traffic. [1] It is similar in design to a three-level stacked roundabout except for its use of (usually signalled) conventional intersections , and can be thought of as two ...
Aug. 22—The new $5.2 million roundabout on U.S. 2 at the Dern/Springcreek Road intersection west of Kalispell will open to motorists in October, state highway officials told the Flathead County ...
The project, paid for through federal funds, will bring two roundabouts for the interchange of U.S. 52 and Marion Pike/State Route 243, an area that has become known for traffic backups in peak ...
A dumbbell interchange along Ontario Highway 401 in Clarington, Ontario, Canada.This one features a loop ramp. The ramp intersections may also be configured as a pair of roundabouts [1] to create a type of diamond interchange often called a dumbbell interchange [citation needed] (due to its aerial resemblance to a dumbbell), and sometimes called a double roundabout interchange.