Automated Driving Control for Time-Varying Traffic Rule Risk
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Solution Overview
Problem
Existing driver assistance technologies fail to account for the intensity and temporal changes in traffic rules, such as varying boundary lines and traffic restriction zones, leading to inconsistent driver assistance control.
Innovation Solution
A driver assistance apparatus that sets a rule deviation risk and allowable risk based on traffic rule intensity and temporal changes, adjusting vehicle speed and track to maintain a higher allowable risk than the deviation risk, ensuring compliance with traffic rules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single allowable risk value is used for each driver, then the system is simple to operate, but it cannot reflect the intensity of traffic rules and temporal changes in traffic rules
Solution Approach 1:
The patent segments the single allowable risk parameter into multiple parameters: rule deviation risk (reflecting traffic rule intensity) and rule deviation allowable risk (reflecting driver preferences and temporal changes). This segmentation allows the system to independently adjust each parameter according to different traffic rule conditions and driver characteristics, thereby achieving adaptability without excessive complexity
Solution Approach 2:
The patent introduces dynamic adjustment mechanisms where the rule deviation allowable risk changes based on temporal factors (time of day, day of week) and traffic rule intensity variations. This dynamic approach enables the system to adapt to temporal changes in traffic rules while maintaining a manageable structure through modular parameter design
2Reliability
If the vehicle strictly follows traffic rules, then traffic rule compliance is high, but driving efficiency and flexibility are reduced
Solution Approach 1:
The patent changes the parameter of risk tolerance by introducing the rule deviation allowable risk parameter that varies with driver preferences and conditions. This allows the system to adjust the balance between rule compliance and driving efficiency by modifying risk parameters rather than rigidly following rules, thereby maintaining reliability while improving productivity
Solution Approach 2:
The patent applies partial deviation from traffic rules when the calculated rule deviation allowable risk exceeds the rule deviation risk. This partial action principle allows the vehicle to occasionally deviate from strict rule following when conditions permit, improving driving efficiency while maintaining overall high compliance through controlled, risk-assessed deviations
3Reliability
If the vehicle speed is reduced to pass by parked vehicles, then collision risk is reduced, but driving time increases
Solution Approach 1:
The patent changes the speed parameter dynamically based on the calculated collision risk and allowable risk values. When the collision risk is lower than the collision allowable risk, the system permits higher speeds to reduce time loss. When risk exceeds allowable levels, speed is reduced to ensure safety. This parameter-based dynamic adjustment optimizes both reliability and time efficiency
Data Source
AI summary
A driver assistance apparatus sets a rule deviation risk indicating a risk of deviation of a vehicle from a traffic rule related to travel of the vehicle for an object of the traffic rule, in accordance with one or both of an intensity of the traffic rule and an application time zone of the traffic rule, and sets a rule deviation allowable risk indicating a travel allowable area of the vehicle against the rule deviation risk. The rule deviation allowable risk is set higher in proportion to a magnitude of a vehicle speed of the vehicle. The driver assistance apparatus sets a target track and a target speed for automated driving of the vehicle, based on the rule deviation risk and the rule deviation allowable risk, to cause the vehicle to travel in a location where the rule deviation allowable risk is higher than the rule deviation risk.