Dynamic Lane Changing Regulation for CAV Dedicated Lanes
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Solution Overview
Problem
The high proportion of connected automated vehicles (CAVs) in expressway diverging areas leads to centralized lane changing positions, disrupting normal traffic flow and reducing efficiency and safety due to diverging and merging conflicts with human-driven vehicles.
Innovation Solution
A dynamic regulation method for lane changing decision points in CAV dedicated lanes, using a plane coordinate system and cubic polynomial calculations to determine optimal lane changing positions based on traffic efficiency and safety risk, considering diversion ratios and real-time traffic information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CAVs travel in dedicated lanes with high proportion, then traffic flow efficiency is improved, but lane changing conflicts and diverging-merging conflicts increase
Solution Approach 1:
The system performs preliminary detection of diversion ratio in advance of the lane changing decision point, and pre-calculates optimal lane changing positions for CAVs before they reach the critical conflict zone. This allows CAVs to smoothly transition lanes in advance, avoiding last-minute lane changes that cause conflicts with human-driven vehicles.
Solution Approach 2:
The patent dynamically adjusts the lane changing decision point position for each CAV based on real-time traffic conditions, diversion ratio, and vehicle-specific parameters. Rather than using a fixed lane changing point for all vehicles, the system continuously optimizes the decision point location, enabling adaptive traffic flow management that reduces conflicts while maintaining high efficiency.
2Ease of operation
If CAVs concentrate at specific lane changing positions, then lane changing operation is simplified, but traffic flow stability deteriorates
Solution Approach 1:
The system applies different lane changing strategies to different CAVs based on their local conditions. Each CAV receives a customized optimal lane changing position calculation considering its specific diversion ratio, current position, speed, and the local traffic density. This distributed, location-specific approach prevents concentration of lane changing actions while maintaining operational simplicity through automated calculation.
3Object-affected harmful factors
If dynamic regulation of lane changing decision point is implemented, then conflict regions are reduced, but system complexity increases
Solution Approach 1:
CAVs autonomously calculate their own optimal lane changing decision points based on information received from the road side unit. Each vehicle independently determines its lane changing strategy using the provided diversion ratio and traffic conditions, without requiring complex centralized control. This self-service approach reduces conflict regions while keeping system complexity manageable through distributed decision-making.
Data Source
AI summary
Disclosed is a dynamic regulation method for a lane changing decision point of a CAV dedicated lane in a diverging area of an expressway, applied to the diverging area of the expressway in which the CAV dedicated lane is provided at an inner side of a road. Vehicles traveling in the CAV dedicated lane are all CAVs. Both the CAVs and human-driven vehicles can travel in ordinary lanes. The method calculates the lane changing decision points of diversion vehicles in the CAV dedicated lane at current time using corresponding algorithms based on a relationship between the lane changing decision points of the CAV dedicated lane and traffic efficiency and a traffic safety. The dynamic regulation method of the present disclosure improves the traffic operation condition of the diversion region, improves traffic efficiency and traffic safety of the diversion region, and reduces fuel emissions, thereby providing a method support for the traffic flow control in the diverging area of the expressway under the setting condition of the CAV dedicated lane.