Split intersection

Split intersection

A split intersection is a rarely built at-grade variant of the diamond interchange. 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.

Existing split intersections

• At Legacy Drive and Preston Parkway, Plano, Texas, with Texas U-turn lanes, 33.070835°N 96.796246°W / 33.070835; -96.796246
• At New Dallas Highway (US-77) and E. Industrial Boulevard TX-340 in Lacy Lakeview, Texas, 31.605353°N 97.110952°W / 31.605353; -97.110952
• 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

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.

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

Further reading

• Simulation of the Split Intersection, ATTAP, University of Maryland, 11 November 2015

See also

• Offset T-intersection
• Hamburger intersection (Throughabout)