Rule-Based 3D Road Intersection Model Automation
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Solution Overview
Problem
The current process of designing 3D road intersections is manual and inefficient, requiring repeated checks and modifications to ensure compliance with design standards, and often results in the creation of 2D models rather than true 3D representations.
Innovation Solution
A rule-based system that automatically designs and updates 3D road intersections based on design conditions and vehicle types, using predefined rules to ensure compliance with standards such as AASHTO guidelines, allowing for dynamic updates and the creation of reusable intersection components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual process is used to create intersections, then flexibility in design modification is maintained, but productivity and efficiency deteriorate due to repeated checks and modifications
Solution Approach 1:
The system enables self-service by automatically generating intersection designs that comply with AASHTO standards without requiring manual intervention. The automated rule-based system performs design, validation, and modification tasks independently, eliminating the need for repeated manual checks while maintaining design flexibility through programmable rules.
Solution Approach 2:
The system changes parameters by transitioning from manual design parameters to automated rule-based parameters. Design standards, vehicle dimensions, and geometric constraints are encoded as programmable parameters that automatically guide intersection creation, improving productivity while maintaining flexibility through parameter adjustability.
2Loss of time
If manual design process is used, then design modifications can be made iteratively, but time consumption increases due to repeated checks and modifications
Solution Approach 1:
The system implements feedback by continuously validating intersection designs against AASHTO standards during the automated design process. The rule-based system provides immediate feedback on compliance, automatically adjusting designs to meet requirements, which reduces iteration time while ensuring reliability through systematic validation.
Solution Approach 2:
The system performs preliminary action by pre-encoding all AASHTO design standards and constraints into the rule-based system before design creation. This preliminary configuration ensures that compliance checks are built-in from the start, eliminating the need for repeated validation iterations and reducing time loss while maintaining reliability.
3Manufacturing precision
If 2D models are created manually, then simplicity in creation is maintained, but manufacturing precision deteriorates as true 3D representations are not achieved
Solution Approach 1:
The system applies dimensionality change by transitioning from 2D intersection representations to true 3D models. The automated rule-based system generates three-dimensional geometric data including vertical profiles, cross-sections, and spatial relationships, achieving manufacturing precision through 3D modeling while managing complexity through algorithmic generation.
4Productivity
If automated rule-based system is implemented, then productivity and precision are improved, but device complexity increases
Solution Approach 1:
The system applies segmentation by dividing the complex automated design process into distinct modular rule sets. Each rule handles specific aspects of intersection design (geometric constraints, vehicle clearance, drainage requirements, etc.), allowing the system to achieve high productivity through organized complexity while maintaining manageability through modular structure.
Data Source
AI summary
A method, apparatus, system, and computer program product provide the ability to design a road intersection in a three-dimensional (3D) modeling and visualization system. Two roads are defined in the system with the second road intersecting the first road. A set of design rules (that define characteristics of use that contribute to a shape of the road intersection) is acquired. Based on the set of rules, a 3D model of the road intersection is directly created. A property of one of the roads is modified. Without additional user input, the 3D model of the road intersection is automatically and dynamically updated based on the modified property and while maintaining conformance with the set of design rules.