Route Stress Indexing for Safer Navigation Decisions
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Solution Overview
Problem
Conventional navigation systems do not account for potential accident risks associated with recommended routes, primarily due to the lack of consideration for stress induced by road conditions, which can lead to increased accident likelihood.
Innovation Solution
A computer-implemented method and system for determining a stress index of a route by dividing it into links and intersections, calculating the stress index for each segment based on various factors, and combining these to obtain an overall stress index, thereby enabling drivers to choose relatively stress-free routes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional navigation systems recommend routes based on speed or distance alone, then route efficiency is improved, but accident risk increases due to unaccounted stress factors
Solution Approach 1:
The patent segments the route into multiple links and intersections, evaluating stress factors for each segment individually. This allows the system to identify high-stress segments within an otherwise efficient route and provide alternative routing options that avoid cumulative stress while maintaining overall efficiency.
Solution Approach 2:
The patent introduces stress index as a new parameter alongside traditional route optimization parameters (time, distance). By changing the evaluation parameters to include stress factors derived from road geometry, traffic conditions, and intersection complexity, the system can recommend routes that balance efficiency with safety.
2Measurement precision
If the route is divided into many small links and intersections for stress evaluation, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the route into links and intersections as fundamental evaluation units. This segmentation enables precise stress measurement at each segment while using standardized evaluation criteria that prevent excessive system complexity. The modular approach allows accurate cumulative stress calculation without requiring overly complex processing.
Solution Approach 2:
The patent applies consistent stress evaluation criteria across all links and intersections, using uniform parameters such as road geometry factors, traffic density thresholds, and intersection complexity metrics. This homogeneity in evaluation methodology maintains measurement precision while simplifying the overall system architecture.
Data Source
AI summary
A computer implemented method for determining a stress index of a route, comprising: determining, based on a cartographic representation, at least one route from a first point to a second point; dividing, by a stress index determination system, the at least one route into one or more links and/or intersections; determining, by the stress index determination system, the stress for the at least one or more links and/or intersections; combining, by the stress index determination system, the stress of the one or more links and/or intersections to obtain an overall stress index of the one or more routes.