Minimal Risk Shoulder Stop Logic for Unreachable Target Locations

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Solution Overview

Problem

Conventional automated driving systems face challenges in efficiently and safely performing minimal risk manoeuvres for road shoulder stops, particularly in situations where the initial target stopping location cannot be reached or maintained.

Innovation Solution

The proposed method and device for automated driving systems involve generating a potential stopping location, determining a target stopping location based on the potential one, and controlling the road shoulder stop of the vehicle. If the target stopping location cannot be reached, the system performs a first operation by generating a second potential stopping location or changing the minimal risk manoeuvre type. If it is still difficult to reach the target, a second operation is performed, which includes changing the manoeuvre type and issuing a fallback alarm to guide the driver.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the automated driving system strictly follows the conventional road shoulder stop control logic, then the system maintains standard operational procedures, but the system cannot adapt when the target stopping location cannot be reached or when system components fail

Engineering Contradiction:

Improveadaptability to unreachable stopping locationsVSAvoidcomplexity of control logic

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The control logic dynamically adjusts the stopping strategy based on real-time conditions. When the target stopping location is unreachable or system components fail, the system transitions from a fixed road shoulder stop procedure to alternative stopping locations and methods, making the control system flexible and adaptive to changing conditions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes operational parameters (stopping location, stopping method, MRM type) based on system state and environmental conditions. When sensors, communication modules, or databases fail, the system modifies these parameters to select alternative stopping locations and methods that maintain safety while adapting to component failures

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the system performs multiple operations to generate alternative potential stopping locations and change MRM types, then the system improves safety and adaptability, but the processing time and computational load increase

Engineering Contradiction:

Improvesafety of road shoulder stopVSAvoidtime for determining target stopping location

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system pre-establishes multiple potential stopping locations and MRM type alternatives before they are needed. When the target stopping location proves unreachable, the system can immediately transition to pre-planned alternatives without extensive recalculation, reducing decision time while maintaining safety

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system continuously monitors whether the target stopping location is reachable and system component status, providing feedback that triggers alternative operations. This feedback mechanism enables the system to quickly detect when conventional procedures fail and switch to alternative stopping strategies, balancing safety with response time

Inventive Principle:

Principle #23Feedback

3Productivity

If the automated driving system attempts to reach the determined target stopping location, then the system achieves the primary stopping objective, but the system may fail to stop safely if the location becomes unreachable or conditions change

Engineering Contradiction:

Improveefficiency of road shoulder stopVSAvoidsafety of stopping manoeuvre

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The system performs the primary road shoulder stop action while preparing alternative actions in parallel. If the primary stopping location becomes unreachable or conditions deteriorate, the system has pre-planned alternative stopping locations and methods ready to execute, ensuring that the stopping objective is achieved even if the initial plan fails

Inventive Principle:

Principle #16Partial or excessive action

Solution Approach 2:

The system prepares alternative stopping strategies in advance as a cushion against potential failures. By having backup potential stopping locations and alternative MRM types ready before they are needed, the system ensures continuous safety capability even when the primary stopping plan becomes invalid

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Data Source

PatentUS20250136096A1Method and device of performing minimal risk manoeuvre for automated driving road shoulder stop by automated driving system

Publication Date: 2025.05.01 HYUNDAI MOBIS CO LTD

AI summary

A method of performing automated driving (MRM)-road shoulder stop (SS) of a vehicle by an automated driving system (ADS) includes generating a first potential stopping location (PSL), determining a target stopping location (TSL) based on the first PSL, and controlling a road shoulder stop of the vehicle based on the TSL. The determining of the TSL includes, based on the determining of the TSL being unsuccessful, performing a first operation for MRM, and the controlling of the road shoulder stop of the vehicle includes, based on determining that it is difficult to reach the TSL, performing a second operation for the MRM.