Vehicle Lane-Change Control for Bifurcation Timing
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Solution Overview
Problem
Autonomous driving vehicles face challenges in successfully changing lanes at bifurcations due to fixed advance lane changing distances, which can result in missed turns if too short or reduced efficiency if too long, especially when encountering high-speed vehicles or being blocked by slower traffic.
Innovation Solution
A method for vehicle lane changing control that acquires map and traffic data ahead when within a certain distance of a bifurcation to determine the optimal position for lane changing, issuing execution information to ensure timely and efficient lane changes, avoiding premature changes and improving success rates and driving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed advance lane changing distance is used, then the lane changing operation is simple to execute, but the success rate of lane changing decreases when vehicle speeds are high and multiple vehicles exist
Solution Approach 1:
The patent applies dynamics by transitioning from a fixed, static lane changing distance to a dynamic, adaptive distance. The system dynamically adjusts the lane changing distance based on real-time traffic conditions, vehicle speeds, and environmental factors. This allows the lane changing operation to adapt to varying situations, improving success rate while maintaining operational simplicity through automated adjustment.
Solution Approach 2:
The patent implements parameter changes by modifying the lane changing distance parameter based on multiple variables including traffic flow, vehicle speeds, road conditions, and weather. The system continuously evaluates these parameters and adjusts the optimal lane changing distance accordingly, enabling reliable lane changing in diverse conditions without increasing operational complexity.
2Productivity
If a short advance lane changing distance is used, then the vehicle can maintain higher driving efficiency, but the lane changing may fail causing the vehicle to miss the bifurcation
Solution Approach 1:
The patent applies preliminary action by calculating and preparing the optimal lane changing distance in advance, before the actual lane changing maneuver. The system evaluates traffic conditions, vehicle speeds, and road geometry ahead of time to determine the precise moment and distance for initiating lane changing. This preliminary calculation ensures both efficiency (by avoiding premature changes) and reliability (by ensuring sufficient time and space for successful completion).
Solution Approach 2:
The system employs feedback mechanisms by continuously monitoring traffic conditions, vehicle speeds, and lane changing progress. Based on this real-time feedback, the system adjusts the lane changing distance and timing to optimize both driving efficiency and success rate. The feedback loop ensures the vehicle can adapt to changing conditions while maintaining optimal performance.
3Reliability
If a long advance lane changing distance is used, then the lane changing success rate improves, but the vehicle may be blocked by low-speed vehicles causing reduced driving efficiency
Solution Approach 1:
The patent resolves this contradiction through dynamic adjustment of the lane changing distance. Rather than using a fixed long distance, the system continuously adapts the optimal distance based on real-time traffic conditions. When low-speed vehicles are detected, the system adjusts the timing and distance to avoid blocking them, thereby maintaining both high success rate and driving efficiency through flexible, condition-based optimization.
Data Source
AI summary
A method for vehicle lane changing control, a device, a storage medium and a program product, relating to the fields of autonomous driving, intelligent transportation, big data, cloud computing, etc. in computer technology. A specific implementation solution is: during a process of vehicle driving, when a distance between the vehicle and a front bifurcation is less than or equal to a longest lane changing operation distance, according to map data and traffic data of a road section ahead, it is determined whether a current position is a preferred position to start performing the lane changing operation, so as to determine whether performing the lane changing operation at the current position; and if determined to perform the lane changing operation at the current position, lane changing operation execution information will be issued to enable the vehicle to start performing the lane changing operation at the current position.