Intersection Velocity Control Under Occluded Visibility
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Solution Overview
Problem
Conventional driving assist systems fail to effectively manage vehicle velocity when visibility at an intersection is limited due to occluding objects, making it difficult for vehicles to properly pass through intersections.
Innovation Solution
A control device that determines the scene at an intersection with limited visibility, assesses whether the vehicle on the traveling road has the right of way, and controls the vehicle's velocity to stop immediately before the intersection if it does not have the right of way, or sets a safe velocity range to avoid collisions with virtual moving objects in occluded areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vehicle maintains higher velocity to improve passage efficiency through the intersection, then productivity is improved, but safety deteriorates due to limited visibility from occluding objects
Solution Approach 1:
The control device applies preliminary anti-action by proactively reducing velocity before the vehicle reaches the occluded area where visibility is limited. The system calculates a reduced velocity that allows the vehicle to pass through the intersection while maintaining safety margins, preventing potential collisions with undetected moving objects in the occluded zone.
Solution Approach 2:
The control device performs preliminary action by determining the appropriate velocity reduction in advance, before the vehicle enters the hazardous occluded area. The system calculates the reduced velocity based on the occluding object's position and the intersection geometry, then applies this velocity control proactively to ensure safe passage.
2Reliability
If the vehicle stops immediately before the intersection to ensure safety when visibility is limited, then safety is improved, but loss of time increases
Solution Approach 1:
The control device applies parameter changes by dynamically adjusting the velocity parameter based on the vehicle's distance from the intersection and the occluding object's position. Instead of a binary stop/go decision, the system continuously modulates velocity to maintain safety while minimizing time loss, allowing smooth passage when conditions permit.
Solution Approach 2:
The control device implements dynamics by making the velocity control adaptive and continuous rather than static. The system constantly monitors the vehicle's position relative to the occluded area and adjusts velocity in real-time, enabling the vehicle to maintain optimal speed while ensuring safety, rather than requiring complete stops.
3Reliability
If the vehicle reduces velocity to maintain safety in occluded areas, then safety is improved, but productivity deteriorates due to slower passage
Solution Approach 1:
The control device optimizes the velocity parameter by calculating a reduced but non-zero velocity that maintains safety while enabling continuous movement through the intersection. The system determines the minimum velocity required to clear the occluded area safely, preventing unnecessary complete stops and maintaining passage efficiency.
Solution Approach 2:
The control device applies the skipping principle by enabling the vehicle to rapidly pass through the hazardous occluded area at a controlled reduced velocity rather than stopping. The system calculates a velocity that allows the vehicle to quickly clear the dangerous zone where visibility is limited, minimizing exposure time to potential hazards while maintaining safety.
Data Source
AI summary
A control device, which controls a velocity of a vehicle, is configured to: determine a scene in which a visibility is limited by an occluding object at an intersection where a traveling road of the vehicle intersects with an intersecting road; determine whether the vehicle on the traveling road has a right of way; and control the velocity of the vehicle to stop immediately before the intersection when the vehicle on the traveling road has no right of way.