Automatic Driving Speed Deviation Display for Lane Change
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Solution Overview
Problem
During automatic lane changes in vehicles, speed deviations from set speeds can cause driver unease due to potential misinterpretation of system abnormalities, leading to unsuccessful lane changes due to driver intervention.
Innovation Solution
An automatic driving system that includes an information acquiring device, a running control device, and a display device to inform drivers of intentional speed deviations by displaying the upper limit speed and deviation value, ensuring transparency and reducing driver unease.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If the vehicle runs at speeds deviating from the set speed to successfully execute lane change control, then the lane change control is achieved, but the driver may mistakenly judge there is an abnormality in the system and intervene, causing the lane change to fail
Solution Approach 1:
The display device provides real-time feedback to the driver by showing the upper limit speed and deviation value during speed-deviation running. This feedback mechanism explains the system's intentional speed deviation, preventing driver misunderstanding and intervention, thereby maintaining both automation execution and driver trust
Solution Approach 2:
The display device acts as an intermediary between the running control device and the driver. It communicates the rationale for speed deviation (showing upper limit speed and deviation value), mediating the driver's perception and preventing harmful intervention while the system executes lane change control
2Reliability
If the vehicle maintains the set speed during lane change control, then the driver feels comfortable and does not intervene, but the lane change may not be successfully executed due to speed constraints
Solution Approach 1:
The system performs preliminary action by determining whether speed-deviation running is necessary before executing lane change control. The display device is prepared to show the upper limit speed and deviation value in advance, enabling smooth transition to speed-deviation mode if needed, thus ensuring both driver comfort and lane change success
Solution Approach 2:
The system dynamically adjusts the vehicle speed based on lane change requirements. The running control device can temporarily deviate from the set speed when necessary for lane change execution, while the display device dynamically shows the deviation value to maintain driver trust, achieving flexibility in speed control
3Device complexity
If the system executes speed-deviation running without informing the driver, then the control algorithm is simple, but the driver experiences unease due to unexpected speed changes
Solution Approach 1:
The display device provides feedback to the driver by showing the upper limit speed and deviation value during speed-deviation running. This simple feedback mechanism effectively communicates the system's intentions, reducing driver unease without adding significant complexity to the control algorithm
Solution Approach 2:
The display device serves itself by automatically showing the deviation value calculated by the running control device. The system self-explains its behavior to the driver through the display, reducing driver unease with minimal additional complexity in the control algorithm
Data Source
AI summary
An automatic driving system includes: an information acquiring device configured to acquire driving environment information indicating a driving environment of the vehicle; a running control device configured to execute lane change control from a first lane to a second lane during automatic driving of the vehicle based on the driving environment information; and a display device configured to display an upper limit value of a running speed of the vehicle which is set by a driver of the vehicle during automatic driving. The display device is configured to display a deviation value which is calculated based on a target value of the running speed and the upper limit value along with the upper limit value during a speed-deviation running in which the running speed is higher than the upper limit value.