Windmill interchange
Encyclopedia
The windmill interchange is a four-way road interchange
.
The windmill serves two arterial roadways by grade separation
. All turning movements are served by a right-hand exit ramp, with stop sign or traffic signal at the ramp termini.
Vehicles make right and left-turn movements at the ramp intersections and are removed from the main intersection in conventional intersection design. Left turns can turn into left merge lanes, so vehicles have to wait gaps in arterial traffic in only one direction (similar to the Continuous Green T-intersection operations.)
This application is best suited for locations where free-flow through movements are desired for both intersecting roadways, with moderate to low turning movement volumes.
This interchange design is best suited for rural locations where ROW is available at the intersection quadrants and quadrant development is low to minimize attraction of turning movement volumes.
Interchange (road)
In the field of road transport, an interchange is a road junction that typically uses grade separation, and one or more ramps, to permit traffic on at least one highway to pass through the junction without directly crossing any other traffic stream. It differs from a standard intersection, at which...
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The windmill serves two arterial roadways by grade separation
Grade separation
Grade separation is the method of aligning a junction of two or more transport axes at different heights so that they will not disrupt the traffic flow on other transit routes when they cross each other. The composition of such transport axes does not have to be uniform; it can consist of a...
. All turning movements are served by a right-hand exit ramp, with stop sign or traffic signal at the ramp termini.
Vehicles make right and left-turn movements at the ramp intersections and are removed from the main intersection in conventional intersection design. Left turns can turn into left merge lanes, so vehicles have to wait gaps in arterial traffic in only one direction (similar to the Continuous Green T-intersection operations.)
This application is best suited for locations where free-flow through movements are desired for both intersecting roadways, with moderate to low turning movement volumes.
This interchange design is best suited for rural locations where ROW is available at the intersection quadrants and quadrant development is low to minimize attraction of turning movement volumes.