Navigation Server Segment Cost Evaluation for Driver Burden
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Solution Overview
Problem
Existing navigation systems prioritize routes that minimize travel time over user comfort, failing to account for factors that contribute to driver burden such as traffic difficulty, road environment changes, curvature, and infrastructure types.
Innovation Solution
A navigation server and client system that evaluates segment costs based on traffic difficulty, road environment changes, curvature, and infrastructure types to select routes that minimize user burden by adjusting route calculations using segment cost index values, thereby prioritizing routes with fewer turns, linear shapes, and stable road conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the route minimizing trip time is selected, then the travel efficiency is improved, but the user burden increases due to complex road environments and frequent turns
Solution Approach 1:
The patent changes the evaluation parameters from simple trip time to a comprehensive segment cost that includes multiple factors: reference segment cost (trip time), segment cost index value (traffic difficulty, road environment changes, curvature, infrastructure types), and correction segment cost. This parameter transformation allows the system to evaluate routes based on both efficiency and user comfort, resolving the contradiction between minimizing trip time and reducing user burden
Solution Approach 2:
The patent divides the route into multiple segments and evaluates each segment independently using segment cost index values. By segmenting the route evaluation process, the system can identify and penalize specific problematic sections (such as high-curvature areas, traffic-difficult segments, or regions with frequent road environment changes) without affecting the entire route selection, thus reducing user burden while maintaining travel efficiency
2Ease of operation
If the route with linear shape and fewer turns is selected, then the user comfort is improved, but the travel time increases
Solution Approach 1:
The patent transforms the route evaluation from a single-dimensional trip time metric to a multi-dimensional segment cost system that incorporates curvature, traffic difficulty, and road environment stability. This allows the system to balance user comfort (fewer turns, linear shapes) with travel time by assigning appropriate weights to different segment cost factors
Solution Approach 2:
The patent dynamically adjusts the segment cost based on real-time or predicted traffic conditions, road environment changes, and other variable factors. This dynamic evaluation allows the system to flexibly balance between linear routes (user comfort) and time-efficient routes (travel time) depending on current conditions, rather than relying on fixed geometric properties alone
Data Source
AI summary
Provided is a navigation server, a navigation client, and a navigation method that allow for searching for a route estimated to have a low degree of making a user feel burdened. A server cost recognition correction element 12 evaluates, for at least one of a plurality of indices representing one or both of a road environment of a subject segment and a relative relationship between the subject segment and one or more of other segments included in the server route candidate, a segment cost index value representing a traffic difficulty of the subject segment, and corrects a cost of the subject segment using the segment cost index value of the subject segment (STEP234, STEP236, STEP239, STEP241, STEP244, STEP247, STEP249, STEP350, and STEP450).