Lane Travel Direction Control at Road Structure Changes
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Solution Overview
Problem
Existing systems fail to accurately determine whether the travel direction of an own lane and an adjoining lane are the same, leading to potential reverse traveling of a vehicle when road structures change, as noted in PTL 1.
Innovation Solution
A traveling control device that includes a processor to determine the travel direction of own and adjoining lanes and restrict movement when road structure changes, using sensors and machine learning models to ensure same-direction lane continuity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If lane changes are made as little as possible after passing through an intersection to lighten the burden on the driver, then the ease of operation is improved, but the reliability deteriorates because the host vehicle is liable to end up moving from the own lane to the adjoining lane whose travel direction is opposite
Solution Approach 1:
The system performs preliminary determination of whether the travel direction of the own lane and the travel direction of the adjoining lane are the same before allowing lane changes. This preliminary check prevents reverse traveling by ensuring the target lane has the same travel direction as the current lane, thereby resolving the contradiction between ease of operation and reliability.
2Productivity
If the determination result that the travel direction of the own lane and the travel direction of the adjoining lane are the same is maintained without rechecking after road structure changes, then the productivity is improved by reducing unnecessary checks, but the reliability deteriorates because the determination may become invalid after road structure changes
Solution Approach 1:
The system dynamically adjusts the determination result based on road structure changes. When a road structure change is detected (such as intersection passage or lane number change), the system invalidates the previous determination result and requires re-determination, ensuring reliability while avoiding unnecessary checks in stable conditions.
3Reliability
If the travel direction determination is rechecked frequently to ensure reliability after road structure changes, then the reliability is improved, but the productivity deteriorates due to increased processing requirements
Solution Approach 1:
The system implements dynamic rechecking based on road structure change detection. Instead of frequent periodic checks, the system only re-determines travel direction when specific triggers occur (intersection passage, lane number changes), thereby maintaining high reliability while minimizing unnecessary processing and preserving productivity.
Data Source
AI summary
A traveling control device determines whether a travel direction of an own lane in which a host vehicle is traveling and the travel direction of an adjoining lane adjoining the own lane are the same, determines whether structure of a road on which the host vehicle is traveling changes, and restricts movement of the host vehicle from the own lane to the adjoining lane when it is determined that the structure of the road on which the host vehicle is traveling changes after it is determined that the travel direction of the own lane and the travel direction of the adjoining lane are the same.