Traffic Signal Controller Accident Data Logging
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Solution Overview
Problem
Current traffic signal systems lack the capability to accurately and reliably reproduce the operation of a traffic signal system at the time of a vehicle accident, relying on unclear witness statements which complicates the reconstruction of accident circumstances.
Innovation Solution
Incorporating a controller with a detection device to detect accident events, a determination device to determine the exact time of the accident, and a safety device to document the operating states of the signal system, along with video technology for image analysis, enabling precise recording and reconstruction of accident circumstances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traffic signal system relies on predefined control and standard signaling procedures, then the system operates smoothly under normal conditions, but it cannot accurately reproduce or reconstruct accident circumstances when an accident occurs
Solution Approach 1:
The system performs preliminary actions by continuously monitoring and storing signaling data, phase states, and traffic information before accidents occur. The storage device is pre-configured to capture relevant parameters, and the system is ready to immediately record accident-related data when detected by the detection device, eliminating the need for post-accident data collection
Solution Approach 2:
The controller acts as an intermediary between the detection device (which detects accidents) and the storage device (which preserves data). It receives accident detection signals, correlates them with currently stored signaling data and phase states, and triggers the preservation of this combined information package, thereby mediating the connection between accident detection and reliable reconstruction
2Measurement precision
If the system stores detailed operating states and signaling data for accident reconstruction, then accurate reproduction of accident circumstances is achieved, but the device complexity increases
Solution Approach 1:
The controller performs multiple functions: it manages normal traffic signaling operations, monitors for accident conditions, stores signaling data and phase states, and triggers accident-related data preservation. This multi-functionality eliminates the need for separate dedicated components for each task, reducing overall device complexity while maintaining high measurement precision
Solution Approach 2:
The system changes operational parameters based on accident detection. Normally, it operates in standard signaling mode, but upon detecting an accident, it switches to a data preservation mode where it captures and stores specific parameters (phase states, signaling data, timestamps) with high precision, thereby achieving accurate measurement only when needed without continuously operating at full complexity
3Loss of information
If the system continuously monitors and stores all signaling data for potential accident reconstruction, then complete accident information is available, but energy consumption and data processing requirements increase
Solution Approach 1:
Instead of continuously processing and storing all possible data, the system employs periodic updates of signaling data and phase states at predetermined intervals. This periodic action reduces the total data volume that must be stored and processed, lowering energy consumption while still providing sufficient information for accident reconstruction when an accident occurs between update cycles
Data Source
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AI summary
Method for controlling a traffic signaling device comprises determining an accident, establishing the accident time point and securing operational states of the traffic signaling device. Independent claims are also included for the following: (1) Control device for a traffic signaling device; (2) Computer program for controlling the traffic signaling device. Preferred Features: The acquisition of the accident is determined using accident information transmitted from the vehicle in the accident. Transfer of the accident information is triggered by activating a sensor or manual device.