Eight-Way Interchange Planar Design for Traffic Flow
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Solution Overview
Problem
Existing road interchanges are costly, cover large areas, and often result in traffic congestion due to complex engineering and multi-layer designs, which hinder efficient vehicle movement and communication.
Innovation Solution
An eight-way interchange design featuring interconnected forked roads, accessorial bridges, and relief roads forming virtual roundabouts, eliminating the need for traffic lights and enhancing traffic flow in 16 directions, with strategically placed traffic signs and lanes to improve safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional multi-layer interchanges are constructed, then vehicle traffic in all directions can be facilitated without traffic lights, but construction cost and engineering work increase significantly
Solution Approach 1:
The patent transitions from traditional multi-layer three-dimensional interchanges to a planar two-dimensional design. The eight forked roads are arranged in a circular pattern on a single level, eliminating the need for multiple elevation layers while maintaining all-direction traffic flow capability. This dimensional simplification reduces construction complexity and cost while preserving traffic efficiency.
Solution Approach 2:
The interchange is segmented into eight distinct forked roads (first through eighth forked roads) that connect in a circular sequence. Each forked road has dedicated lanes for different traffic directions (straight, left-turn, right-turn), allowing independent traffic flow management without requiring complex multi-layer stacking. This segmentation enables efficient traffic distribution across multiple directions using a simplified single-level structure.
2Productivity
If traditional multi-layer interchanges are constructed, then all-direction traffic flow is enabled, but the area covered increases significantly
Solution Approach 1:
By collapsing the three-dimensional multi-layer structure into a two-dimensional planar arrangement, the patent concentrates traffic flow within a smaller footprint. The circular configuration of eight forked roads on a single level utilizes horizontal space more efficiently than vertical stacking, reducing the overall area required while maintaining equivalent or superior traffic flow capacity.
Solution Approach 2:
The patent merges multiple traffic functions (straight-through, left-turn, right-turn movements) into a single-level circular interchange rather than distributing them across multiple layers. This consolidation of traffic flow paths into a compact planar design reduces the total area required compared to traditional multi-layer interchanges that spread traffic functions vertically across large footprints.
3Adaptability or versatility
If traditional interchanges with many layers are built, then multi-directional traffic is accommodated, but traffic congestion occurs due to poor communication between forks
Solution Approach 1:
The patent creates a homogeneous traffic flow environment by designing all eight forked roads with identical lane configurations and connection patterns. Each forked road has consistent straight lanes, left-turn relief roads, and right-turn lanes, ensuring uniform traffic distribution and communication across all directions. This homogeneity eliminates the poor communication between forks that plagues asymmetric multi-layer interchanges, enabling smooth traffic flow in all directions.
4Productivity
If eight-way interchange with virtual roundabouts is implemented, then traffic efficiency improves and congestion reduces, but construction complexity increases
Solution Approach 1:
The patent uses standardized replicated units throughout the interchange design. Each of the eight forked roads contains identical lane configurations, relief road arrangements, and connection patterns. This copying of standardized modules simplifies construction planning and execution compared to designing unique complex structures for each direction, even though the overall interchange has multiple components. The repetitive nature of the design reduces construction complexity despite the sophisticated traffic flow patterns.
Data Source
AI summary
The invention belongs to the technical field of interchange, in particular to an eight-way interchange. The following technical scheme is proposed, comprising a first forked road, a third forked road, a second forked road, a fourth forked road, a fifth forked road, a sixth forked road, a seventh forked road and an eighth forked road. The first forked road and the third forked road, the second forked road and the fourth forked road constitute a cross overpass, the first forked road and the third forked road constitute an upper two-way straight lane, the second forked road and the fourth forked road constitute a lower two-way straight lane. The invention has simple structures. Motor vehicles can complete straight driving, left turn, right turn and U-turn through upper straight two-way lanes, lower straight two-way lanes and eight right-turn lanes, realizing the interconnection of all eight forked roads in 16 traffic directions.