Quadrant roadway intersection

A quadrant roadway intersection adds an additional "quadrant roadway" between two legs of an

intersection In mathematics, the intersection of two or more objects is another object consisting of everything that is contained in all of the objects simultaneously. For example, in Euclidean geometry, when two lines in a plane are not parallel, thei ...

. This roadway adds two

three-way intersection A three-way junction (or three-way intersection) is a type of intersection (road), road intersection with three arms. A Y junction (or Y intersection) generally has three arms of equal size coming at an acute angle, acute or obtuse angle to each ...

s in addition to the original four-way intersection moving all left turns (in

right-hand traffic Left-hand traffic (LHT) and right-hand traffic (RHT) are the practices, in bidirectional traffic, of keeping to the left side or to the right side of the road, respectively. They are fundamental to traffic flow, and are sometimes referred to ...

countries) or right turns (in

left-hand traffic Left-hand traffic (LHT) and right-hand traffic (RHT) are the practices, in bidirectional traffic, of keeping to the left side or to the right side of the road, respectively. They are fundamental to traffic flow, and are sometimes referred to ...

countries) from the main intersection. The design is intended to improve traffic flow by reducing signal timing phases from four to two in the main intersection. The design is intended for intersections where large artery routes meet in an area of dense development and high pedestrian volume. Proponents also point to a reduction in places where accidents could occur from vehicles potentially crossing paths as well as a low development cost compared to

roundabout A roundabout is a type of circular intersection or junction in which road traffic is permitted to flow in one direction around a central island, and priority is typically given to traffic already in the junction.''The New Shorter Oxford E ...

s or the more complex

single-point urban interchange A single-point urban interchange (SPUI, or ), also called a single-point interchange (SPI) or single-point diamond interchange (SPDI), is a type of highway intercha