Importance

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Abstract

The present invention is a traffic-weaving-free grade-separated road junction that provides for continuous flow of traffic and provides exterior exits and entrances only (i.e., it provides right-side exits and entrances only where the convention is for traffic to keep to the right, but provides left-side exits and entrances only where the convention is for traffic to keep to the left). Two of the embodiments have two loop ramps and require as few as two bridges. Two other embodiments have no loop ramps and require as few as three bridges. In addition, four other embodiments have one loop ramp and require as few as three bridges; two other embodiments have no loop ramps and require as few as four bridges; and two embodiments provide U-turn ramps, have no loop ramps, and require as few as three bridges. Compared to prior art junctions that also provide for continuous flow of traffic, avoid weaving, and provide exterior exits and entrances only, the present invention can be constructed with fewer bridges and/or fewer loop ramps. Therefore, the present invention provides reduced structure-related costs and/or increased safety and speed for drivers. In addition, because it can be constructed with fewer bridges than said prior art junctions, the present invention provides lower aesthetic impacts and other environmental costs. Finally, the embodiments of the present invention provide an additional set of design options for road engineers to choose from when designing within particular constraints of right-of-way, topography, and other factors.

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First Claim