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Free-flow interchange

Index Free-flow interchange

A free-flow interchange is an interchange in which all roads are grade-separated, and where movement from one road to another does not require the driver to stop for traffic (for example, the interchange may not include traffic lights or unsignalized at-grade intersections). [1]

11 relations: Cloverleaf interchange, Diamond interchange, Diverging diamond interchange, Grade separation, Interchange (road), Intersection (road), Partial cloverleaf interchange, Stack interchange, Three-level diamond interchange, Traffic congestion, Traffic light.

Cloverleaf interchange

A cloverleaf interchange is a two-level interchange in which left turns (reverse directions in left-driving regions) are handled by ramp roads (US: ramps, UK: slip roads).

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Diamond interchange

A diamond interchange is a common type of road junction, used where a freeway crosses a minor road.

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Diverging diamond interchange

A diverging diamond interchange (DDI), also called a double crossover diamond interchange (DCD), is a type of diamond interchange in which the two directions of traffic on the non-freeway road cross to the opposite side on both sides of the bridge at the freeway.

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Grade separation

Grade separation is the name given to a method of aligning a junction of two or more surface transport axes at different heights (grades) so that they will not disrupt the traffic flow on other transit routes when they cross each other.

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Interchange (road)

In the field of road transport, an interchange is a road junction that uses grade separation, and typically one or more ramps, to permit traffic on at least one highway to pass through the junction without interruption from any other crossing traffic stream.

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Intersection (road)

An intersection is an at-grade junction where two or more roads meet or cross.

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Partial cloverleaf interchange

A partial cloverleaf interchange or parclo is a modification of a cloverleaf interchange.

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Stack interchange

A stack interchange, or colloquially butterfly junction, is a particular, free-flowing type of designs for interchanges, meaning grade-separated road junctions.

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Three-level diamond interchange

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.

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Traffic congestion

Traffic congestion is a condition on transport networks that occurs as use increases, and is characterized by slower speeds, longer trip times, and increased vehicular queueing.

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Traffic light

Traffic lights, also known as traffic signals, traffic lamps, traffic semaphore, signal lights, stop lights, robots (in South Africa and most of Africa), and traffic control signals (in technical parlance), are signalling devices positioned at road intersections, pedestrian crossings, and other locations to control flows of traffic.

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References

[1] https://en.wikipedia.org/wiki/Free-flow_interchange

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