Drive Assistance Device Route-Specific Alert Timing
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Solution Overview
Problem
Existing drive assistance devices often perform unnecessary assistance, annoying drivers by providing alerts for stopping when it is not required, especially at intersections with arrow display devices where the necessity of stopping varies based on the vehicle's route.
Innovation Solution
A drive assistance device that includes a communication unit, vehicle speed detection unit, navigation system, and ECU, which assesses the traffic signal display state and vehicle route to delay and customize drive assistance operations, reducing unnecessary alerts by determining the appropriate timing for alerts based on the vehicle's intended route.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drive assistance is performed whenever a red light signal is received, then the driver is stimulated to stop the vehicle, but unnecessary drive assistance is performed when arrow display devices are active, causing driver annoyance
Solution Approach 1:
The system applies different drive assistance strategies based on the specific lane and arrow display conditions. When an arrow display is active, the ECU determines whether to provide drive assistance based on the vehicle's intended route (indicated by lane position or turn signal), rather than applying a uniform red-light stop stimulus to all vehicles. This localized differentiation eliminates unnecessary alerts for vehicles proceeding in permitted directions while maintaining assistance for those that must stop.
2Ease of operation
If drive assistance operations are performed uniformly for all vehicles, then the system is simple to operate, but it cannot account for route-specific requirements at intersections with arrow display devices
Solution Approach 1:
The drive assistance system dynamically adjusts its behavior based on real-time conditions detected by the ECU. The system monitors arrow display status, vehicle lane position, and turn signal activation to determine the appropriate drive assistance response. This dynamic adaptation allows the system to automatically differentiate between vehicles that need to stop and those that can proceed, eliminating the need for complex manual configuration while preserving route-specific information.
3Loss of time
If the system provides drive assistance alerts early, then the driver has sufficient time to react, but unnecessary alerts are given when the vehicle will proceed through green arrow displays
Solution Approach 1:
The system performs preliminary assessment of the traffic signal state and vehicle route intention before providing drive assistance alerts. The ECU evaluates whether an arrow display is active and whether the vehicle's intended path is permitted before triggering any alert. This preliminary filtering ensures that drive assistance is only provided when genuinely necessary, eliminating premature or unnecessary alerts while maintaining adequate reaction time for legitimate stop requirements.
Data Source
AI summary
Disclosed is a drive assistance device capable of performing proper drive assistance by reducing unnecessary drive assistance operations. The drive assistance device performs drive assistance relative to stopping of a vehicle at an intersection. When the vehicle approaches the intersection where an arrow lamp device is installed at a traffic signal, if the necessity of drive assistance for stimulating a driver to stop at the signal according to lighting of the arrow lamp device differs depending on a route of the vehicle, the start timing of the drive assistance operation is delayed and drive assistance is executed. Therefore, an unnecessary drive assistance operation can be suppressed.