Three-Dimensional Urban Road System Traffic Separation
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Solution Overview
Problem
Existing three-dimensional urban road systems fail to effectively manage traffic flow and parking in large and middle-sized cities, leading to persistent traffic jams and inefficiencies due to limitations in land use and interconnectivity between road layers.
Innovation Solution
A three-dimensional urban road system comprising a straight section with a bottom road, a parking layer, and a running layer, connected by ramps and bridges, allowing for seamless transitions and intercommunications between layers, thereby separating and managing traffic flow and parking efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If overpasses are built at cross roads to disperse traffic flow, then traffic jam is reduced at cross roads, but land use efficiency deteriorates and three-dimensional road system connectivity is insufficient
Solution Approach 1:
The patent implements a three-dimensional road system with multiple elevation levels (first road surface level, second road surface level, and third road surface level) connected by ramps. This vertical dimensionality allows traffic to be distributed across different heights, increasing overall traffic capacity while reducing the horizontal footprint and improving land use efficiency compared to traditional two-dimensional overpass systems.
Solution Approach 2:
The road system is segmented into multiple independent layers (first, second, and third road surfaces) that can be accessed through separate ramps. This segmentation allows traffic to be divided and routed through different elevation levels, preventing congestion at any single cross road while maintaining efficient land use through the stacked configuration.
2Productivity
If overpasses are constructed to separate motor cars, then motor vehicle traffic is managed, but non-motor vehicles and pedestrians face interference and access difficulties
Solution Approach 1:
The patent separates motor vehicle traffic into dedicated elevated road layers while maintaining separate access pathways for non-motor vehicles and pedestrians at the ground level. The first road surface level is designated for motor cars, while the second and third levels provide additional motor vehicle routes, leaving the ground level accessible to bicycles and pedestrians without interference from overhead traffic.
Solution Approach 2:
The patent introduces intermediate ramps as transition zones that connect different road surface levels. These ramps are designed with appropriate gradients and widths that accommodate both motor vehicles and non-motor vehicles, serving as intermediary pathways that facilitate multi-mode transportation while maintaining the separation of traffic flows through vertical stacking.
3Ease of manufacture
If traditional road systems are used, then construction is simpler, but traffic congestion persists due to inability to intensively utilize land
Solution Approach 1:
The patent extends the traditional two-dimensional road layout into a three-dimensional structure with multiple elevation levels. This adds vertical capacity to the road system, allowing significantly more traffic to be accommodated within the same horizontal footprint while maintaining relatively simple construction techniques through the use of stacked, modular road surface layers connected by ramps.
Data Source
AI summary
A three-dimensional urban road system capable of intensively utilizing land and avoiding traffic jam, including a straight section, a longitudinal slope section and an intersection. The straight section and the intersection are connected to form a road network. The longitudinal slope section is connected with the straight section, realizing connection between the straight section and the ground. The straight section includes a bottom road, a parking layer and a running layer; parallel ramps for small cars only arranged such that small cars in the straight section can switch among the three layers. Roads are changed into three layers: the upper running layer for small cars; the middle parking layer, a transfer layer for parking and connecting the ground road and the upper running layer; and the bottom road for large vehicles. Large vehicles and small cars are completely shunted, thus effectively solving the problem of traffic jam.