Vehicle Control System for Interflow Zone Handover Timing
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Solution Overview
Problem
Existing vehicle control systems face challenges in balancing the possibility of automatic interflow in an interflow lane with ensuring running safety, as they often fail to allocate sufficient time for handover from automatic to manual control, leading to inefficiencies in both processes.
Innovation Solution
A vehicle control system that judges conditions for automatic interflow and initiates manual interflow notifications strategically, allowing for gentle deceleration and adjusting notification positions to ensure compatibility between automatic interflow possibilities and safety, by setting specific deceleration values and notification timing based on interflow zone lengths and vehicle states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the control device tries to execute the proposal for handover as much as possible in the interflow lane, then the possibility of automatic interflow is improved, but the time for executing the handover proposal is insufficient
Solution Approach 1:
The interflow zone is divided into multiple segments with different control strategies. The first zone prioritizes automatic interflow execution, while the second zone transitions to handover proposal, and the third zone ensures safety by preparing for manual intervention. This segmentation allows the system to optimize for automatic interflow in the first zone without completely sacrificing handover time in subsequent zones.
Solution Approach 2:
The control device dynamically adjusts its behavior based on the vehicle's position within the interflow zone. As the vehicle progresses through different zones, the system transitions from prioritizing automatic interflow to prioritizing handover proposals, and finally to safety-oriented manual control preparation. This dynamic adjustment resolves the contradiction by adapting the control strategy to the current operational context.
2Loss of time
If the control device tries to set much time for executing the proposal for handover, then the handover time is improved, but the time for automatic interflow is insufficient
Solution Approach 1:
The interflow zone is segmented into multiple functional zones where the first zone is dedicated to automatic interflow execution with minimal handover interruption, while the second and third zones provide sufficient time for handover proposals and manual control preparation. This segmentation ensures that automatic interflow gets priority time in the first zone while handover processes are adequately timed in subsequent zones.
Solution Approach 2:
The control device performs preliminary assessments of interflow conditions at the entrance of the interflow zone before committing to automatic interflow execution. This preliminary action allows the system to prepare handover proposals in advance if conditions change, ensuring that sufficient time is allocated for handover without compromising the automatic interflow execution window.
3Productivity
If the control device executes automatic interflow in the interflow lane, then the efficiency of lane change is improved, but the running safety in the interflow lane may be compromised
Solution Approach 1:
The interflow zone is segmented into multiple zones with progressively different safety priorities. The first zone allows aggressive automatic interflow execution for efficiency, while the second zone introduces handover proposals, and the third zone prioritizes safety by preparing for manual control. This segmentation enables the system to maximize efficiency in the first zone while ensuring safety through progressive safety mechanisms in subsequent zones.
Solution Approach 2:
The control device implements beforehand cushioning by preparing for potential safety issues before they occur. At the entrance of the interflow zone, the system assesses interflow conditions and prepares contingency plans. During automatic interflow execution, the system continuously monitors conditions and prepares handover proposals in advance, ensuring that safety measures are already in place before any safety-critical situation arises.
Data Source
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AI summary
When the subject vehicle reaches the position PNO in the middle of the interflow zone, it is judged whether the conditions for automatic interflow are satisfied. When it is judged that the condition for automatic interflow are not satisfied at the position PNO, the notification for urging manual interflow by the driver is started. Otherwise, the notification for manual interflow is not started. In the case where the notification for manual interflow was not started, when the subject vehicle reaches the position PGU between the distal end of the interflow zone and the position PNO, the notification for manual interflow is started.