Road Junction Vehicle Sequencing for Autonomous Traffic Flow
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Solution Overview
Problem
Existing autonomous driving systems face challenges in managing vehicle conflicts and congestion at road junctions, leading to inefficiencies and increased manual operation costs, especially in scenarios like ports and expressway toll stations, where unified decision-making and path planning are lacking.
Innovation Solution
A vehicle control method and system that determines a passing sequence position for vehicles at road junctions based on topological relationships, attribute information, and status information, using a vehicle control apparatus deployed in various forms, to manage and schedule vehicles in a unified manner, reducing gridlock and congestion by optimizing passage timing and routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If vehicles autonomously navigate road junctions without centralized coordination, then individual vehicle decision-making speed is improved, but gridlock and congestion phenomena occur due to lack of unified scheduling
Solution Approach 1:
The patent introduces a centralized control server as an intermediary between vehicles and road junctions. The server receives status information from vehicles, determines passing sequence positions based on topological relationships and vehicle attributes, and sends control instructions to vehicles. This mediator coordinates vehicle passage to prevent gridlock while maintaining efficient throughput.
Solution Approach 2:
The system performs preliminary actions by determining passing sequence positions before vehicles reach the road junction. The control server calculates the optimal passing order based on vehicle status, road topology, and junction attributes in advance, allowing vehicles to adjust their speed and position proactively rather than reactively.
2Productivity
If centralized control is implemented to manage vehicle passage, then road junction congestion is reduced, but system complexity increases due to additional control infrastructure
Solution Approach 1:
The control server performs multiple functions: it acts as a communication hub receiving vehicle status information, a calculation engine determining passing sequences based on topological relationships, and a command center sending control instructions. This multi-functional design consolidates complexity into a single versatile system rather than requiring multiple specialized components.
Solution Approach 2:
Vehicles autonomously report their status information (position, speed, destination) to the control server without requiring manual intervention. The server automatically processes this information, determines optimal passing sequences, and sends instructions back to vehicles, creating a self-managing system that reduces operational complexity.
3Reliability
If vehicles maintain larger spacing to avoid conflicts at junctions, then collision risk is reduced, but overall operation efficiency decreases due to increased waiting time
Solution Approach 1:
The system dynamically adjusts vehicle spacing and passing sequences based on real-time conditions. The control server continuously receives status information from vehicles and recalculates passing orders, allowing vehicles to maintain optimal spacing that balances safety requirements with throughput efficiency, rather than using fixed conservative distances.
Solution Approach 2:
The control system implements continuous feedback by monitoring vehicle status information (position, speed, acceleration) and adjusting passing sequence assignments accordingly. This closed-loop control allows the system to respond to actual vehicle behavior, maintaining safe spacing while minimizing unnecessary waiting time caused by overly conservative fixed-distance rules.
Data Source
AI summary
This application discloses a vehicle control method, apparatus, and system, and relates to the field of autonomous driving technologies. The method includes: obtaining a topological relationship of a road junction, where the topological relationship indicates a road associated with the road junction; determining a passing sequence position of a target vehicle at the road junction based on attribute information of the road junction, status information of the target vehicle, and the topological relationship, where the target vehicle is located on an upstream road of the road junction; and indicating, based on the passing sequence position, passing of the target vehicle at the road junction. According to the method, passage sequencing of vehicles at a road junction is performed, to help reduce conflicts between the vehicles and improve passing efficiency of the vehicles.