Split intersection

A split intersection is a rarely built at-grade variant of the diamond interchange.[1] Compared to a conventional four-leg intersection or road crossing, the arterial road is split into separate carriageways by 200 to 300 feet (61 to 91 m), allowing a queue of left turning vehicles behind a completed turn into the crossroad without any conflict to oncoming traffic. On the crossroad, the four leg intersection is being replaced by two intersections. The beginning one-way traffic at the fourth leg makes the intersections reduce the number of conflicts similar to a three leg T-intersection to improve traffic flow.[2][3]

Split intersection

Existing examples

Town center intersection
Town Center Intersection (TCI)

A town center intersection (TCI) is similar to a split intersection; however, both the arterial road and the crossroad are split into separated one-way streets. The resulting grid, most often implemented in a city, reduces conflicts to two directions per intersection.[4][5]

The TCI's grade-separated variant is the three-level diamond interchange.

gollark: Oh.
gollark: Single core?!
gollark: The cool people are on Wayland nowadays.
gollark: Smarter format sorting is very gladdening. I might switch to this.
gollark: The UK situation is similar to the US's except that it costs less and you literally cannot get higher speeds at all most places.

See also

References
  1. Bared, Joe G. & Kaiser, Evangelos I. (June 2000). "Advantages of The Split Intersection". Public Roads. Vol. 63 no. 6. Federal Highway Administration.
  2. Bared, Joe & Kaiser, Evangelos (2000). "Benefits of Split Intersections". Journal of the Transportation Research Board. Vol. 1797. Transportation Research Board. pp. 34–41. doi:10.3141/1737-05.
  3. Rodegerdts, Lee A.; Nevers, Brandon; Robinson, Bruce; Ringert, John; Koonce, Peter; Bansen, Justin; Nguyen, Tina; McGill, John; Stewart, Del; Suggett, Jeff; Neuman, Tim; Antonucci, Nick; Hardy, Kelly & Courage, Ken (2004). "Chapter 10.3.1,". Signalized Intersections: Informational Guide. Federal Highway Administration. FHWA-HRT-04-091. (PDF)
  4. http://innovativeintersections.org/place-making-innovative-intersections/town-center-intersections/
  5. http://www.alternativeintersections.org/intersections/show/type_id:2

Further reading
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