Split intersection
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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 artierial road is being split-up into separated carriageways by 200 to 300 feet, 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]
Existing split intersections
- At Legacy Drive and Preston Parkway, Plano, Texas, with Texas U-turn lanes, 33°04′15″N 96°47′46″W / 33.070835°N 96.796246°W
- At New Dallas Highway (US-77) and E. Industrial Boulevard TX-340 in Lacy Lakeview, Texas, 31°36′19″N 97°06′39″W / 31.605353°N 97.110952°W
- At Stock Road and Winterfold Road in Perth, Australia
- It is the most common intersection design on Utah State Route 85, also called Mountain View Corridor, at begin of construction.
Town center intersection
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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 carriageways. The resulting grid reduces conflicts to two directions per intersection.[4][5]
It is usually used as a grid of one-way streets in cities to reduce conflicts.[6]
The TCI's grade-separated variant is the three-level diamond interchange.
The TCI's partial grade-separated variant is the split diamond interchange.
Further reading
- Simulation of the Split Intersection, ATTAP, University of Maryland, 11 November 2015
See also
References
- ^ Joe G. Bared and Evangelos I. Kaisar: Advantages of The Split Intersection, Federal Highway Administration, Issue No: Vol. 63 No. 6, June 2000
- ^ Joe Bared, Evangelos Kaisar: Benefits of Split Intersections, Transportation Research Board, DOI 10.3141/1737-05
- ^ Federal Highway Administration: Signalized Intersections: Informational Guide, Chapter 10.3.1, publikation number FHWA-HRT-04-091, 2004 (PDF)
- ^ http://innovativeintersections.org/place-making-innovative-intersections/town-center-intersections/
- ^ http://www.alternativeintersections.org/intersections/show/type_id:2
- ^ [1]