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 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.

## Existing examples

* At Legacy Drive and Preston Road, Plano, Texas, with Texas U-turn lanes, 33°04′15″N 96°47′46″W﻿ / ﻿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°36′19″N 97°06′39″W﻿ / ﻿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. They are planned to be later converted, mostly into diamond interchanges, by adding a bridge in the middle.
* At Sarcee Trail and Richmond Road, Calgary, Alberta, Canada, 51°01′05″N 114°09′55″W﻿ / ﻿51.018046°N 114.165263°W﻿ / 51.018046; -114.165263
* Four intersections along Terwillegar Drive in Edmonton, Alberta, Canada
* Four intersections along Manning Drive in Edmonton, Alberta, Canada
* Lake Woodlands Drive at Grogans Mill Road in The Woodlands, Texas; 30°09′56″N 95°27′59″W﻿ / ﻿30.165692°N 95.466449°W﻿ / 30.165692; -95.466449

## 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 streets. The resulting grid, most often implemented in a city, reduces conflicts to two directions per intersection.

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

### Examples

* Grogans Mill Road at Research Forest Drive in The Woodlands, Texas; 30°10′37″N 95°27′58″W﻿ / ﻿30.176893°N 95.466073°W﻿ / 30.176893; -95.466073
* Springwoods Village Parkway at Holzwarth Road in Spring, Texas; 30°05′47″N 95°27′05″W﻿ / ﻿30.096443°N 95.451283°W﻿ / 30.096443; -95.451283
* San Elijo Road at Elfin Forest Road in San Marcos, California; 33°05′54″N 117°12′00″W﻿ / ﻿33.098444°N 117.199894°W﻿ / 33.098444; -117.199894
* 170 Street and Stony Plain Road and 100 Ave in Edmonton, Alberta.
