Mixed Traffic Conflict Determination via Segmented Geometric Models
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Solution Overview
Problem
Current traffic safety evaluation methods are inadequate for rapidly assessing mixed traffic conflicts in complex urban environments, as they are limited to single-type traffic units and involve complex, time-consuming calculations that are impractical for ordinary traffic managers.
Innovation Solution
A method for rapid determination of mixed traffic conflicts involves identifying and categorizing traffic units, calculating movement distances within a reaction time using specific geometric models for vehicles and pedestrians, and determining potential conflict areas to assign safety levels based on conflict coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing traffic conflict determination methods with high accuracy models are used, then measurement precision is improved, but device complexity and calculation time increase significantly
Solution Approach 1:
The patent segments traffic individual units by type (motor vehicles, non-motor vehicles, pedestrians) and applies different simplified geometric models to each category. This segmentation allows the system to maintain high determination accuracy for each specific traffic type while avoiding the need for a single overly complex universal model, thus reducing overall device complexity and calculation burden.
2Measurement precision
If existing traffic conflict determination methods with high accuracy models are used, then measurement precision is improved, but productivity decreases due to time-consuming calculations
Solution Approach 1:
The patent changes the parameters of the geometric models based on traffic type characteristics. For example, motor vehicles use rectangular models with specific dimensional parameters, while pedestrians use circular models with radius parameters. This parameter adaptation allows each model to maintain high accuracy for its specific application while keeping calculations simple and fast, thereby improving productivity without sacrificing measurement precision.
3Device complexity
If single-type traffic conflict determination methods are used, then device complexity is reduced, but adaptability decreases for mixed traffic environments
Solution Approach 1:
The patent creates a universal determination system that can handle multiple traffic types (motor vehicles, non-motor vehicles, pedestrians) within a single integrated framework. Each traffic type has its own simplified geometric model, but all models operate under the same overall system architecture and conflict determination logic. This multi-functionality allows the system to adapt to mixed traffic environments while maintaining relative simplicity through standardized processing procedures.
Data Source
AI summary
The present invention discloses a method for rapid determining a situation of mixed traffic conflicts, which is used in the field of traffic management, including identifying each of traffic individual units in the road section to be detected, calculating a movement distance of the traffic individual units within the reaction time, and obtaining critical conflict areas for vehicles and pedestrians. Then by obtaining intersections of critical conflict areas to finally obtain potential traffic conflict areas. Compared with the previous traffic conflict determination technology, it has strong operability, many applicable objects, wide application range, intuitive and visible results, and practical promotion value.