Exclusive Turn Lane Overflow Detection From Upstream Lane Changes
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Solution Overview
Problem
Existing technologies struggle to accurately detect traffic congestion caused by vehicles overflowing right-turn or left-turn exclusive lanes, as GPS devices have low positional accuracy and continuously acquiring image data is impractical due to high communication demands.
Innovation Solution
An information processing device that acquires the upstream end of an exclusive lane based on vehicle steering angles and lane changes to determine when a predetermined proportion of vehicles change lanes away from the exclusive lane, indicating congestion due to vehicles overflowing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If GPS devices are used to detect vehicle positions for identifying congested lanes, then the detection coverage is improved, but the positional accuracy deteriorates due to low GPS precision
Solution Approach 1:
The patent introduces lane change detection as an intermediary mechanism to indirectly identify congested lanes. Instead of directly measuring vehicle positions with GPS, the system detects lane changes upstream of exclusive lanes and uses this as evidence of overflow congestion. This intermediary approach compensates for GPS inaccuracy by using behavioral patterns rather than absolute position data.
Solution Approach 2:
The patent replaces the mechanical GPS positioning system with a behavioral analysis system based on lane change detection. Rather than relying on satellite-based position coordinates, the system substitutes with detection of directional lane changes upstream of exclusive lanes, which serves as a more reliable indicator of congestion caused by overflow.
2Measurement precision
If image data is continuously acquired to accurately detect congestion, then the detection precision is improved, but the communication demand and system complexity worsen
Solution Approach 1:
The patent extracts only the essential information needed for congestion detection - specifically, lane change events upstream of exclusive lanes - rather than processing continuous image data. This extraction approach maintains detection precision by focusing on the key behavioral indicator (lane changes) while eliminating the need for complex image processing and continuous communication.
Solution Approach 2:
The patent applies partial action by monitoring only specific events (lane changes) in specific locations (upstream of exclusive lanes) rather than continuously acquiring and processing all image data. This selective monitoring achieves sufficient detection precision while dramatically reducing communication demands and system complexity.
3Ease of operation
If the proportion of vehicles in exclusive lanes is monitored to detect congestion, then the detection simplicity is improved, but the accuracy deteriorates due to inability to distinguish overflow congestion from other congestion causes
Solution Approach 1:
The patent performs preliminary detection of lane changes upstream of exclusive lanes before vehicles actually enter the exclusive lanes. By detecting the intent to enter (lane change behavior) in advance, the system can identify overflow congestion with higher accuracy, distinguishing it from other congestion causes. This preliminary action maintains simplicity while improving precision.
Data Source
AI summary
An information processing device includes a control unit configured to acquire an upstream end of a range of a right-turn or left-turn exclusive lane in response to occurrence of traffic congestion, and output information on the occurrence of the traffic congestion due to a vehicle overflowing the exclusive lane, in response to a predetermined first proportion or more of vehicles having changed lanes in a direction away from the exclusive lane at a position upstream of the upstream end of the range of the exclusive lane.