Quadrant roadway intersection
From Wikipedia, the free encyclopedia
A quadrant roadway intersection includes an extra roadway between two legs of the intersection. This roadway adds two three-way intersections in addition to the original four-way intersection.
The advantage is that all left-turns are removed from the primary intersection. Therefore, the three-way intersections may operate with three signal phases and the four-way intersection may operate with only two signal phases. The reduced quantity of signal phases improves the efficiency of the intersection.
The disadvantage, however, is that motorists wishing to turn left from either the major or minor road may have to travel further to do so. Also, right-of-way and cost limitations may reduce the feasibility of this type of intersection treatment.
[edit] External Links
| Types of road junctions | |
| Interchanges (grade separated) | Cloverleaf - Diamond - Directional T - Diverging diamond Parclo - Trumpet - SPUI - Stack - Three-level diamond |
| Intersections (at-grade) | Box junction - Continuous flow - Crossroads - Hook turn - Jughandle - Michigan left Quadrant roadway - Roundabout - Superstreet - 3-way junction - Traffic circle |
 | This road-related article is a stub. You can help Wikipedia by expanding it. |
