Intersection Vehicle Notification Using V2X for Blind-Angle Right Turns
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Solution Overview
Problem
In-vehicle sensors struggle to detect traffic participants at blind angles, particularly when large vehicles obstruct the view, making it difficult to avoid collisions during right turns at intersections on left-hand traffic roads.
Innovation Solution
A vehicle notification system that includes a direction-change-intention detection unit, notification issuance timing setting unit, and notification issuing units to provide timely and differentiated notifications to vehicles based on their relative positions and intended maneuvers, enhancing collision avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If in-vehicle sensors are used to detect traffic participants, then detection capability is provided, but detection reliability deteriorates when vehicles are present at blind angles behind obstacles
Solution Approach 1:
The patent introduces V2X communication as an intermediary mechanism to share detection information between vehicles. The notification issuing unit transmits detection results to other vehicles via V2X communication, allowing vehicles to overcome blind angle limitations by utilizing detection data from neighboring vehicles. This mediator approach enables reliable detection of traffic participants that would otherwise be undetectable due to obstruction by large vehicles.
2Reliability
If notification issuance is performed for all detected vehicles, then collision avoidance is improved, but information overload increases
Solution Approach 1:
The patent applies local quality by differentiating notification issuance based on the specific situation of each detected vehicle. The notification issuing unit determines whether to issue notifications based on vehicle types (e.g., large vehicles vs. small vehicles), positions relative to blind angles, and detection reliability. This selective approach ensures that notifications are issued only when necessary and locally relevant, avoiding unnecessary information overload while maintaining collision avoidance effectiveness.
Data Source
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AI summary
In a traffic situation where the right turning vehicle VA, the oncoming vehicle VB and the crossing vehicle VC are traveling toward the intersection CS, the vehicle notification system 1 issues a notification to the traffic participants VA, VB and VC under a condition that a notification issuance condition defined in relation to the positions of the oncoming vehicle VB and the crossing vehicle VC is met at the notification issuance timing in accordance with the relative position of the right turning vehicle VA to the intersection CS after detecting the right turn intention of the right turning vehicle VA. When the notification issuance condition is met for both the oncoming vehicle VB and the crossing vehicle VC, the vehicle notification system 1 issues a notification to each of them to raise awareness of the presence of the other.