Lane Change Timing Control for Multi-Lane Route Guidance
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Solution Overview
Problem
Existing route guidance systems for vehicles fail to effectively navigate lane changes on roads with multiple lanes, particularly during automated driving, as they do not consider the timing and method of lane changes, leading to restricted vehicle movement and potential difficulties in reaching target lanes.
Innovation Solution
A route guidance apparatus that includes a current lane detection system, target lane calculation, total required distance calculation, remaining distance calculation, and timing determination for automated or manual lane changes, allowing for precise timing of lane changes based on the number of required lane changes and remaining distance to the course change point, thereby improving route guidance and vehicle freedom.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If automated driving control is implemented without lane change timing consideration, then automated driving functionality is achieved, but vehicle freedom and route guidance quality deteriorate due to restricted movement on multi-lane roads
Solution Approach 1:
The automated driving control is segmented into two independent modules: route guidance module and lane change control module. The route guidance module determines the optimal route and target lane based on destination and current position, while the lane change control module independently manages timing and execution of lane changes. This segmentation allows each module to specialize, improving overall system performance and vehicle freedom on multi-lane roads.
Solution Approach 2:
The system performs preliminary calculation of the target lane and timing determination before executing lane changes. The route guidance module pre-calculates which lane the vehicle should be in at upcoming intersections or exits, and the lane change control module determines the optimal timing in advance, allowing smooth and timely lane changes without restricting vehicle freedom.
2Device complexity
If lane change timing is not determined based on remaining distance and required lane changes, then system complexity is reduced, but route guidance precision and lane change efficiency deteriorate
Solution Approach 1:
The system performs preliminary calculation of the target lane based on the current route and upcoming intersections/exits. By calculating which lane the vehicle should occupy at future course change points in advance, the system achieves precise route guidance without requiring complex real-time decision-making algorithms.
Solution Approach 2:
The lane change timing determination dynamically adjusts based on remaining distance to the course change point and the number of lane changes required. The system calculates optimal timing by considering the vehicle's current position, speed, and the sequence of lane changes needed, creating a dynamic and adaptive timing mechanism that maintains precision without excessive complexity.
3Adaptability or versatility
If multiple lane changes are required to reach the target lane, then the ability to navigate complex intersections is improved, but the distance and time required for lane changes increases
Solution Approach 1:
The system pre-calculates the sequence of lane changes required to reach the target lane at upcoming intersections or exits. By determining the optimal lane change sequence in advance, the system can plan multiple lane changes efficiently, reducing the total time and distance required compared to reactive lane changing.
Solution Approach 2:
The lane change timing determination dynamically optimizes the execution of multiple lane changes based on remaining distance and current vehicle state. The system adjusts the timing of each lane change in the sequence to minimize total lane change time while ensuring the vehicle reaches the target lane before the course change point, thereby reducing time loss without compromising navigation capability.
Data Source
AI summary
Provided is a route guidance apparatus and a route guidance method which are capable of appropriately performing route guidance on a road where a plurality of lanes exist on one side. The route guidance apparatus 12 or the route guidance method determines the timing of the automated or manual lane change based on the total required distance Dlcttl corresponding to the number of required lane changes Nlcn required for reaching the target lane 502tar from the current lane 502cur, and the remaining distance to the planned course change point Prc from the current position Pcur. When the timing of the lane change is reached, the timing of the automated lane change or the manual lane change is guided, or the automated lane change is performed.