Vehicle Intersection Control via Signal Verification
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Solution Overview
Problem
Existing vehicle control systems face challenges in accurately controlling vehicle movement through intersections due to deviations in traffic signal operation timing, caused by delays or errors in communication and coding, leading to potential misalignment between vehicle control and actual traffic signal displays.
Innovation Solution
A vehicle control system that combines traffic signal display information from a traffic control unit with real-time recognition information from a mounted detector, allowing for adaptive driving control based on both scheduled and actual traffic signal states, including soft deceleration and deceleration suppression controls to ensure safe passage through intersections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vehicle control is based solely on traffic signal display information from the traffic control unit, then the control system can operate with simpler architecture and lower cost, but the control accuracy deteriorates due to deviations in traffic signal operation timing caused by communication delays and coding errors
Solution Approach 1:
The system introduces feedback by having the vehicle-mounted detector continuously monitor the actual traffic signal display and compare it with the scheduled display information received from the traffic control unit. When deviations are detected (such as timing errors or incorrect signal states), the system uses this feedback to adjust vehicle control decisions, ensuring accurate response to actual traffic conditions rather than relying solely on potentially erroneous scheduled information
Solution Approach 2:
The vehicle-mounted traffic signal detector acts as an intermediary between the actual traffic signal and the vehicle control system. It directly observes the real traffic signal display and provides independent verification information, mediating between the scheduled signal information from the control unit and the final vehicle control decisions to ensure accuracy despite communication delays or errors
2Adaptability or versatility
If the system uses only scheduled traffic signal information, then the response time is faster with less processing required, but the adaptability to actual traffic conditions deteriorates when signal operation timing deviates from the schedule
Solution Approach 1:
The system performs partial verification by having the detector monitor only critical aspects of the traffic signal (current display state and timing deviations) rather than continuously analyzing all signal characteristics. This selective monitoring approach provides sufficient adaptability to handle timing deviations and signal errors while minimizing the processing time required, avoiding excessive analysis that would unnecessarily delay vehicle control responses
Data Source
AI summary
A method includes the step of receiving traffic signal display information from a traffic control unit controlling a display of a traffic signal located near an intersection when a vehicle is driving toward the intersection. The traffic signal display information includes a current display state of the traffic signal and information indicating a remaining time for which the current display state of the traffic signal will continues. The method further includes the step of acquiring traffic signal recognition information when the vehicle is driving toward the intersection. The traffic signal recognition information is recognized by a traffic signal detector mounted on the vehicle and indicating a current display of the traffic signal. The method further includes the step of controlling driving of the vehicle when the vehicle enters the intersection based on the traffic signal display information and the traffic signal recognition information.