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A grade-separated rail interchange is known as a flying junction and one which is not a level junction. In 1897, the London and South Western Railway (LSWR) made use of a flying junction at Worting Junction south of Basingstoke to allow traffic on the Salisbury and Southampton routes to converge without conflicting movements; this became known ...
In the field of road transport, an interchange (American English) or a grade-separated junction (British English) is a road junction that uses grade separations to allow for the movement of traffic between two or more roadways or highways, using a system of interconnecting roadways to permit traffic on at least one of the routes to pass through ...
Proper design of grade-separated interchanges to provide for the movement of traffic between two or more roadways on different levels. More frequent (compared to other road types) construction of tunnels and overpasses, requiring complex equipment and methods of operation.
Stack interchange, butterfly junction, or directional interchange A free-flowing, grade-separated junction between two roads, where movements are handled by semi-directional flyovers or under ramps. Vehicles first exit the main carriageway, then complete the turn via a ramp that crosses both highways, eventually merging with the traffic from ...
A grade-separated junction is a transport junction where at least one bridge or tunnel is used to separate traffic flows (known as grade separation). Relevant articles include: Road interchanges, known as grade-separated junctions in the UK; A flying junction, a type of grade-separated junction found on railway lines
I-520 in Augusta, Georgia has an at-grade intersection with a gravel and asphalt road that provides access to Lovers Lane. I-40 in the mountains of western North Carolina has at-grade access to several dirt roads, as well as a partially grade-separated interchange that lacks ramps or RIROs where roads directly connect to the I-40 carriageways.
A directional interchange is a grade separated junction between two roads where all turns that require crossing over or under the opposite road's lanes of travel to complete the turn utilize ramps that make a direct or semi-direct connection. The difference between direct and semi-direct connections is how much the motorist deviates from the ...
A fly-over designed CFI interchange (separated grade) was invented by Francisco Mier. An intersection (at-grade) variant followed. Over 40 have been implemented since 2000. Mier patented his design and required a fee to obtain a license to the design. [2] The patent expired in the United States on 15 October 2003. [3]