Stacked Interchange Ramp Layout for Low-Clearance Traffic Weaving
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Solution Overview
Problem
Existing interchange structures face challenges in meeting minimum height clearance requirements due to land availability and geological constraints, making full-fledged development difficult and costly, and often result in traffic congestion at intersections.
Innovation Solution
An interchange system comprising elevated ramps and connecting decks that facilitate traffic separation and merging, allowing for reduced height clearance and efficient traffic management, including first and second carriageways with ramps and weaving sections to manage heavy and light traffic flows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If full-fledged interchange structures are designed to meet minimum height clearance requirements, then all types of vehicles including heavy vehicles can utilize the interchange, but the structure requires increased land area, more labor, time, and money
Solution Approach 1:
The patent transitions from a traditional two-dimensional ground-level interchange layout to a three-dimensional stacked configuration with elevated ramps and connecting decks. Multiple carriageways are arranged vertically at different heights, allowing traffic to move between intersections without requiring extensive horizontal land area. This vertical stacking enables full interchange functionality while minimizing the footprint on the ground.
Solution Approach 2:
The interchange structure is divided into multiple independent segments including separate ramps, connecting decks, and carriageway sections at different elevations. Each segment can be designed and constructed independently, allowing for optimized land use and reduced overall footprint while maintaining complete interchange functionality for all vehicle types.
2Adaptability or versatility
If full-fledged interchange structures are designed to meet minimum height clearance requirements, then smooth passage for all vehicles is ensured, but the design and development consumes lot of labor, time, and money
Solution Approach 1:
By arranging carriageways and ramps in three dimensions at different heights, the patent creates a compact interchange structure that provides full vehicle compatibility without the extensive horizontal spread of traditional designs. The vertical stacking reduces the overall complexity of land acquisition and civil works while maintaining all necessary clearance requirements.
Solution Approach 2:
The elevated ramp and connecting deck structure serves multiple functions simultaneously: providing height clearance for heavy vehicles, enabling traffic flow between intersecting roads, and creating a compact footprint. This multi-functional design reduces the need for separate structures and simplifies the overall development process.
3Length of stationary object
If ramps are built closer together with varying gradients and lengths, then the overall height and cost of interchange structures is reduced, but the design must accommodate traffic weaving sections and maintain efficient traffic flow
Solution Approach 1:
The patent uses vertical separation to create dedicated traffic weaving sections at different elevations, allowing ramps to be positioned closer together horizontally. Traffic transitioning between carriageways does so through vertically-staggered weaving sections, which maintains efficient flow patterns while reducing the overall horizontal length of the interchange structure.
4Area of stationary object
If the interchange structure maintains a low maximum depth, then land availability constraints are addressed, but the design must carefully manage ramp elevations and traffic weaving sections
Solution Approach 1:
The patent achieves a compact land footprint by stacking ramps and carriageways vertically at controlled elevations. The maximum depth of the structure is minimized by carefully designing the vertical profile, while the complexity of ramp configurations is managed through standardized connecting decks and modular ramp sections that can be adapted to different elevation requirements.
Data Source
AI summary
An interchange system includes a first carriageway, a second carriageway, a first ramp, a second ramp, a third ramp, a fourth ramp, a connecting deck, a first traffic weaving section, and a second traffic weaving section. The first ramp and the second ramp extend from a first portion of the first carriageway. The third ramp and the fourth ramp extend from a first portion of the second carriageway. The first ramp is elevated relative to the second ramp. The fourth ramp is elevated relative to the third ramp. The connecting deck connects the first ramp to the fourth ramp. The first traffic weaving section is defined between the first ramp and the connecting deck. The second traffic weaving section is defined between the fourth ramp and the connecting deck. A primary ramp extends from the first traffic weaving section; a secondary ramp extends from the second traffic weaving section.