Lane Departure Warning Control for Curves and Driver State
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Solution Overview
Problem
Existing road departure mitigation systems often activate unnecessarily, annoying drivers and potentially reducing marketability and safety by issuing false alarms when drivers intentionally leave the travel path, such as when pulling over or entering a shop.
Innovation Solution
A control device that uses external sensors and driving status sensors to recognize partition lines, estimate the likelihood of departing from the path, and control notifications based on the presence of curves and the driver's suitability for staying on the path, only activating road departure mitigation when there is a high risk of accident-related departures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If road departure mitigation control is activated to improve safety, then safety is improved, but excessive notifications occur when drivers intentionally leave the path causing driver annoyance
Solution Approach 1:
The system changes the parameter of notification activation from a simple binary state to a conditional state based on multiple parameters: curve radius (less than 200m), departure possibility (high), and driving status (not suitable). This multi-parameter evaluation resolves the contradiction by enabling notifications only when safety is at risk while suppressing unnecessary notifications during intentional path departures.
Solution Approach 2:
The system incorporates feedback from driving status sensors to continuously monitor whether the driver is in a suitable state for path maintenance. This feedback mechanism allows the system to distinguish between unintentional departures requiring notification and intentional departures where the driver is aware of their actions, thereby resolving the contradiction between safety monitoring and driver annoyance.
2Reliability
If notification is activated frequently to ensure safety, then safety monitoring is improved, but driver satisfaction decreases due to excessive alarms
Solution Approach 1:
The system transforms the notification activation from a frequent, simple condition to a selective, multi-parameter condition. By requiring simultaneous satisfaction of three parameters (curve radius < 200m, high departure possibility, unsuitable driving status), the system maintains comprehensive safety monitoring while dramatically reducing unnecessary notifications, thus improving driver satisfaction without compromising safety monitoring capability.
Solution Approach 2:
The system applies partial action by selectively activating notifications only in specific high-risk scenarios rather than continuously or frequently. This partial activation strategy ensures safety monitoring is maintained where needed while avoiding excessive notifications that would reduce driver satisfaction, resolving the contradiction between thorough monitoring and driver comfort.
3Reliability
If the system monitors all departures to improve safety, then safety is improved, but false alarms increase when drivers intentionally pull over or enter shops
Solution Approach 1:
The system uses feedback from driving status sensors to determine whether the driver is in a suitable state for path maintenance. When the driver is intentionally leaving the path (unsuitable driving status), the system understands this context and suppresses false alarms. This feedback mechanism resolves the contradiction by enabling the system to distinguish between safety-critical departures and intentional departures, maintaining safety monitoring while eliminating false alarms.
Solution Approach 2:
The system changes the activation parameter from monitoring all departures to monitoring only departures that meet three specific conditions. This parameter transformation reduces false alarms by filtering out intentional departures while maintaining detection of genuine safety risks, resolving the contradiction between comprehensive safety monitoring and false alarm reduction.
Data Source
AI summary
A control device for controlling a host vehicle includes processing circuitry configured to: recognize partition lines marking off left and right sides of a travel path on which the host vehicle travels; estimate a possibility of the host vehicle to depart from the travel path based on a position and a posture of the host vehicle with respect to the recognized partition lines; and control the notification based on the estimated possibility of departing from the travel path, the driving status information, and a state of the travel path in a traveling direction of the host vehicle. The processing circuitry executes the notification when there is a curve with a curvature radius less than a predetermined value in the traveling direction, and there is a high possibility of departing from the travel path, and the driving status of the driver is not suitable for traveling on the travel path.