Road Shoulder Evacuation Control With Time-Limited Stop Decisions
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Solution Overview
Problem
Existing evacuation running assistance systems prolong the evacuation time when a driver becomes unable to drive, especially on roads with few safe evacuation options like highways without road shoulders, hindering timely rescue.
Innovation Solution
An evacuation running assistance system that recognizes road shoulder spaces and surrounding vehicles, sets time limits for evacuation, and determines the possibility of shoulder evacuation, allowing immediate on-lane stopping if shoulder evacuation is not possible within the set time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the system determines evacuation destination based on map information and surrounding environment without time limit consideration, then the evacuation route can be established, but the evacuation running time becomes excessively prolonged when road shoulder options are limited
Solution Approach 1:
The system performs preliminary determination of road shoulder evacuation possibility before finalizing the evacuation route. By assessing whether road shoulder evacuation is feasible in advance and setting appropriate time limits, the system avoids selecting routes that would result in excessively prolonged evacuation times, thus resolving the contradiction between route safety and evacuation time.
2Measurement precision
If the system continuously monitors surrounding environment for road shoulder space, then accurate evacuation possibility determination is achieved, but system complexity increases
Solution Approach 1:
The system utilizes existing surrounding environment recognition results from the autonomous driving system to determine road shoulder evacuation possibility, rather than implementing a separate dedicated recognition system. This self-service approach leverages available data resources, achieving accurate evacuation possibility determination while avoiding additional system complexity.
Data Source
AI summary
An evacuation running assistance system includes a road shoulder evacuation possibility determiner to determine if an own vehicle can be evacuated to a road shoulder; an own vehicle situation determiner to determine a current situation of an own vehicle in accordance with a time limit and the road shoulder evacuation possibility, a controller to control an own vehicle in accordance with the situation of the own vehicle; and a road shoulder evacuation possibility road determiner to acquire evacuation space information from a past running history of the own vehicle. The own vehicle situation determiner determines that the own vehicle is in the situation to be controlled to perform the on-lane stopping when the road shoulder evacuation possibility road determiner does not determine within the provisional time that the evacuation of the own vehicle to the road shoulder is possible.