Road Model Intersection Node Grid
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Solution Overview
Problem
Current road modeling software faces challenges in accurately representing road surfaces, especially at intersections, due to variations in file formats and interpretations by different field devices, leading to inconsistencies and difficulties in verifying model correctness and implementing smooth transitions.
Innovation Solution
A computer-implemented method and system that identifies intersections between roads, designates a unified layer for merging roads at specific elevations, and automatically creates a united layer where strings from both roads intersect, ensuring a smooth and accurate road surface representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cross sections are used to represent road surfaces, then the road profile can be defined at specific locations, but the representation becomes excessively complex at intersections requiring numerous closely-spaced cross sections that are difficult to verify
Solution Approach 1:
The patent divides the road model into distinct segments: straight roadway sections use cross-section templates while intersection areas use a node-based grid system. This segmentation allows each area to be modeled with the most appropriate method, reducing overall complexity while maintaining precision where needed.
Solution Approach 2:
The patent transitions from one-dimensional cross-section spacing along a centerline to a two-dimensional node-based grid system at intersections. Nodes are positioned at specific (x, y) coordinates with elevation values, creating a surface mesh that accurately represents intersection geometry without requiring excessive data points.
2Adaptability or versatility
If multiple file formats are used to define road models, then compatibility with different field devices is achieved, but different interpretations of the same model elements lead to inconsistencies
Solution Approach 1:
The patent introduces an intermediary conversion process that translates the unified node-based intersection model into multiple field device-specific formats. The conversion module acts as a mediator, ensuring each device receives data in its native format while maintaining semantic consistency through controlled vocabulary and standardized coordinate systems.
Solution Approach 2:
The patent creates a homogeneous internal representation using standardized node objects with consistent properties (coordinates, elevation, connectivity) throughout the model. This homogeneous structure eliminates ambiguity in how intersection geometry is defined, ensuring reliable interpretation across different output formats and field devices.
3Productivity
If traditional alignments and templates are used to describe roads, then simple roadways can be modeled efficiently, but divided highways with multiple roadways and ramps cannot be accurately represented
Solution Approach 1:
The patent implements a dynamic modeling approach where the representation method adapts to the complexity of the roadway. Simple sections use efficient template-based alignments for quick modeling, while complex intersection areas automatically transition to the more versatile node-based system that can handle multiple roadways, ramps, and varying geometries.
Solution Approach 2:
The node-based intersection model serves multiple functions: it can represent simple crossings, complex interchanges, divided highways, and varying elevation profiles within a single unified framework. This universal approach replaces the need for multiple specialized modeling techniques while maintaining efficiency through automated node generation from alignment data.
4Ease of manufacture
If a single template is applied to describe road sections, then simple geometries can be modeled, but any change to one element requires redefinition of the entire template resulting in numerous revisions
Solution Approach 1:
The patent segments the road model into independent node objects rather than using monolithic templates. Each node represents a discrete location with its own elevation and connectivity properties, allowing individual nodes to be modified without affecting the entire model. This eliminates the need to redefine complete templates when making localized changes.
Solution Approach 2:
The patent applies node-based modeling selectively only to intersection areas where complexity requires it, while maintaining efficient template-based modeling for simple roadway sections. This partial application of the more flexible (but computationally intensive) node system minimizes revision requirements while providing enhanced capability where needed.
Data Source
AI summary
Embodiments of the present invention recite a computer implemented method and system for creating a road model. In one embodiment, an identification of an intersection of a first road and a second road is received. At least one designated elevation is received at which the first road and the second road should merge. Finally a united layer is automatically created for the intersection wherein a first plurality of strings defining the first road and a second plurality of strings defining the second road intersect at the at least one designated elevation.