Adaptive Traffic Light Control for Special Vehicle Priority
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Solution Overview
Problem
Existing traffic light control systems do not adequately consider traffic status at intersections when prioritizing special vehicles, leading to inefficiencies and increased wait times for both special vehicles and regular traffic.
Innovation Solution
A method that acquires a pre-estimated driving duration for special vehicles to reach an intersection stop line and adjusts traffic light changes based on real-time traffic status information, ensuring minimal wait time for special vehicles while minimizing disruption to regular traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traffic lights are controlled to allow special vehicles to pass through the intersection smoothly, then the special vehicles may complete tasks in time, but the traffic status at the intersection is not taken into account which may have an impact on the traffic at the intersection
Solution Approach 1:
The traffic light control system dynamically adjusts signal timing based on real-time traffic status and special vehicle requirements. The system transitions from fixed periodic timing to adaptive timing that responds to current conditions, optimizing both special vehicle passage and overall traffic flow by continuously monitoring and adjusting to changing parameters.
Solution Approach 2:
The system incorporates feedback mechanisms by monitoring traffic status at the intersection and using this information to adjust traffic light control decisions. The feedback loop evaluates whether granting priority to special vehicles would negatively impact intersection traffic flow, and adjusts the control strategy accordingly to balance both objectives.
2Device complexity
If traffic lights illuminate periodically with constant illumination duration for each color, then the control is simple, but it cannot adapt to special vehicle priority requests or changing traffic conditions
Solution Approach 1:
The traffic light control system is designed to perform multiple functions: it handles regular periodic cycling for normal traffic flow, responds to special vehicle priority requests, and adapts to changing traffic conditions. This multi-functionality allows a single system to serve both simple periodic control and complex adaptive control needs without requiring separate systems.
Solution Approach 2:
The system changes operational parameters (illumination duration, timing sequences) based on detected conditions and requests. Rather than maintaining fixed parameters, the system dynamically modifies timing parameters in response to special vehicle requests and traffic status, enabling adaptability while building upon the basic periodic control framework.
Data Source
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Figure 4A~4B
AI summary
A method and apparatus of controlling traffic, an electronic device, a roadside device, a cloud control platform, a storage medium and a program product are provided. The method includes: acquiring a pre-estimated driving duration for a target vehicle from a current position to a stop line of an intersection; determining a first change information for traffic lights at the intersection, based on the pre-estimated driving duration; acquiring a traffic status information for an intersecting lane that intersects a lane at which the target vehicle is located; and adjusting the first change information based at least on the traffic status information for the intersecting lane, to obtain a second change information, in response to the traffic status information meeting a preset status condition, so as to control the traffic lights based on the second change information.