Driving Assistance System with Adaptive Traffic Light Reliability
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Solution Overview
Problem
Current Traffic Signal Prediction Systems (TSPS) face inaccuracies in vehicle positioning using satellite GPS, leading to incorrect traffic light information transmission and ineffective driving assistance due to potential misidentification of the vehicle's location, causing inconsistencies between suggested actions and actual vehicle behavior.
Innovation Solution
A driving assistance system that includes a reception unit for traffic light information, a remaining distance calculation unit, a passing speed range calculation unit, and a messaging unit to provide accurate assistance based on real-time traffic light data, with a vehicle behavior storing unit to adjust messaging reliability based on consistency with actual vehicle actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If satellite positioning system (GPS) is used to determine vehicle position, then the system can provide traffic light information to the vehicle, but the position determination becomes inaccurate in certain environments, leading to incorrect traffic light information
Solution Approach 1:
The system collects feedback data on the actual accuracy of traffic light information by comparing predicted traffic light states with actual observed states. This feedback is used to adjust and improve the positioning accuracy assessment, creating a closed-loop system that continuously refines its performance based on real-world outcomes.
Solution Approach 2:
The system dynamically changes the parameter of positioning accuracy threshold based on environmental conditions and historical data. When GPS accuracy degrades in certain environments, the system adjusts the threshold for accepting position data and may switch to alternative positioning methods or increase reliance on predictive algorithms.
2Adaptability or versatility
If the system provides driving assistance information based on inaccurate position data, then the system maintains high adaptability to provide assistance, but the reliability of the assistance information decreases
Solution Approach 1:
The system applies partial action by providing assistance information only when positioning accuracy meets certain thresholds. When accuracy is insufficient, the system withholds or reduces the provision of assistance information rather than providing potentially incorrect guidance, thus maintaining reliability while preserving adaptability for when conditions are favorable.
Solution Approach 2:
The system prepares cushioning measures in advance by having alternative positioning methods ready and by pre-establishing protocols for when positioning accuracy deteriorates. This includes switching to map-matching algorithms, using relative positioning from known points, or pausing assistance provision until accuracy improves.
3Speed
If the system transmits traffic light information from server to vehicle via wireless communication, then the system can provide real-time information, but the information becomes useless when vehicle position is inaccurate, causing driver confusion
Solution Approach 1:
The system performs preliminary verification of position accuracy before transmitting traffic light information from the server. Only when the vehicle's position is confirmed to be accurate enough does the system request and transmit real-time traffic light data, preventing the transmission of useless information that would confuse the driver.
Data Source
AI summary
The reception unit receives the traffic light information at least a transition between first and second light colors of a traffic light at an intersection and turn-on times of the first and the second light colors, using a wireless signal received from a server via a transceiver. A position acquisition unit acquires a position of a vehicle. A passing speed range calculation unit calculates a speed range in which the vehicle is allowed to pass through the intersection in accordance with light colors of the traffic light, based on the traffic light information and on the position of the vehicle. The messaging unit outputs a message of driving assistance information including suggestions for deceleration or a passage possibility through the traffic intersection. A vehicle behavior storing unit stores content of the message and a behavior of the vehicle corresponding to the content of the message in a behavior memorizing unit.