Autonomous Lane Change Display Timing Below Speed Threshold
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Solution Overview
Problem
In vehicles capable of autonomous driving, the permissibility of an autonomous lane change is often delayed due to the adjacent lane being hidden when the vehicle speed is below a predetermined value, causing a delay in communicating the lane change decision to the driver.
Innovation Solution
An automated driving system that includes a processor to control the display device, prohibiting autonomous lane changes below a predetermined speed and hiding the adjacent lane, while starting to display the adjacent lane before the vehicle reaches the predetermined speed if acceleration is planned, and displaying the destination lane of the lane change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adjacent lane is hidden when autonomous lane change is prohibited (vehicle speed below predetermined value), then the safety of autonomous lane change is improved, but the information communication to driver is delayed
Solution Approach 1:
The display device starts displaying the adjacent lane before the vehicle reaches the predetermined speed threshold, in advance of when autonomous lane change becomes permitted. This preliminary display action allows the driver to see the destination lane information earlier, reducing information communication delay while maintaining safety by still prohibiting the actual lane change until appropriate speed is reached.
Solution Approach 2:
The display control is segmented into different states: when autonomous lane change is prohibited, the system displays only the running lane; when acceleration to meet speed threshold is planned, the system transitions to displaying both the running lane and adjacent lane. This segmentation allows selective information provision based on vehicle state.
2Device complexity
If the adjacent lane is always hidden when autonomous lane change is prohibited, then the system complexity is reduced, but the driver awareness of lane change plan is delayed
Solution Approach 1:
The display device dynamically adjusts its content based on vehicle speed and autonomous lane change permissibility. When the vehicle is below the speed threshold but planned to accelerate, the display transitions from showing only the running lane to showing both the running lane and adjacent lane, providing timely information without requiring complex static display logic.
Solution Approach 2:
The system uses feedback from vehicle speed detection and autonomous lane change permission status to control display content. The display device receives feedback about whether the vehicle is approaching the speed threshold and adjusts accordingly, showing the adjacent lane when acceleration is planned, which improves driver awareness while maintaining manageable system complexity through rule-based control.
Data Source
AI summary
The automated driving system includes a vehicle speed detection device for detecting a speed of a vehicle, a display device capable of displaying a running lane and an adjacent lane of the vehicle, and a processor configured to control display content of the display device, and execute an autonomous lane change of the vehicle. The processor is configured to prohibit the autonomous lane change of the vehicle when a speed of the vehicle is less than a predetermined value. The processor is configured to hide the adjacent lane when the autonomous lane change is prohibited and start displaying the adjacent lane before the speed of the vehicle reaches the predetermined value if it is planned for the vehicle to accelerate from a speed below the predetermined value to a speed equal to or greater than the predetermined value in order to carry out the autonomous lane change.