Dynamic Traffic Flow Control Using RFID Queue Detection
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Solution Overview
Problem
Existing traffic flow control systems, whether fixed-time or traffic-dependent, lack flexibility and are unable to effectively detect and mitigate congestion at intersections, leading to inefficiencies and increased costs.
Innovation Solution
A computer-implemented method using RFID-enabled devices to define and manage vehicle queues, determine congestion, and adjust traffic flow to minimize wait times and overall congestion through intersections, employing active RFID technology and linear programming to optimize traffic flow with minimal infrastructure investment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fixed-time signal control is used, then the system is relatively inexpensive, but it lacks flexibility with respect to changes in traffic conditions
Solution Approach 1:
The patent implements dynamic traffic signal control by transitioning from fixed-time tables to a system that continuously monitors queue lengths and adjusts signal phases in real-time based on actual traffic conditions, making the system adaptable while maintaining cost-effectiveness
Solution Approach 2:
The system incorporates feedback mechanisms by detecting queue lengths at each intersection approach and using this information to dynamically adjust signal timing, enabling the system to respond to changing traffic conditions without requiring expensive infrastructure
2Adaptability or versatility
If traffic-dependent methods with detectors are used, then short-term flexibility is improved, but the system becomes expensive and requires extensive pre-planning
Solution Approach 1:
The patent extracts the essential function of traffic detection by using simplified queue length detection methods rather than comprehensive detector systems, achieving adequate short-term flexibility without the complexity and cost of extensive detector networks
Solution Approach 2:
The system uses cost-effective detection mechanisms that provide sufficient information for traffic control decisions without requiring expensive, permanent detector installations, reducing both initial investment and maintenance costs
3Ease of operation
If conventional light signal systems are used, then traffic flow is controlled at intersections, but congestion cannot be detected or reduced
Solution Approach 1:
The system performs preliminary detection of queue lengths at each intersection approach before making control decisions, enabling proactive congestion management by identifying and addressing bottlenecks before they fully develop
Solution Approach 2:
The patent implements feedback by continuously monitoring queue lengths and using this information to adjust signal timing, enabling the system to detect and respond to congestion conditions dynamically rather than operating on fixed schedules
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach reduces vehicle wait times, increases road capacity, decreases fuel consumption and pollution, and provides data for future planning while being cost-effective and flexible, effectively addressing the limitations of current traffic control systems.
Implementation Method 1
a reader of the RFID enabled devices configured to determine a location of the RFID enabled device
Data Source
AI summary
Methods and systems for controlling vehicular traffic flow in a transport system are provided. The method includes defining a plurality of queues through the transport system, assigning each of a plurality of vehicles into one of the plurality of queues, determining a number of vehicles in each queue and a period of time each vehicle remains in the queue, and permitting traffic flow in at least one queue that facilitates reducing the congestion of the plurality of queues.