Lane Change Proposal Timing for Adaptive Driving Assistance
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Solution Overview
Problem
Existing autonomous driving systems may fail to provide timely lane change opportunities due to prolonged cancellation of lane change proposals, especially when travel environments change, leading to missed opportunities for passengers who prefer lane changes.
Innovation Solution
A driving assistance method that sets a threshold value for relative speed and allows lane change proposals only when conditions are met, with a longer delay for high threshold values to minimize environmental changes and shorter delays for passengers preferring lane changes, and cancels proposals until a set time elapses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the controller cancels the lane change proposal when the lane change execution condition is not satisfied, then the safety and reliability of lane change operations is improved, but the opportunity for lane change is lost due to prolonged prohibition period
Solution Approach 1:
The prohibition period is made dynamic rather than fixed. The controller adjusts the prohibition period length based on the detected travel environment - extending it when the environment is stable and reducing it when the environment changes, allowing the system to adapt between safety and opportunity capture
Solution Approach 2:
The controller continuously monitors travel environment changes and uses this feedback to adjust the prohibition period. When environmental changes are detected during the prohibition period, the controller reduces the remaining prohibition time, creating a feedback loop that balances safety with responsiveness to changing conditions
2Productivity
If the controller presents lane change proposals frequently, then the opportunity for lane change is increased for passengers who prefer lane change, but unnecessary proposals are made for passengers who do not prefer lane change
Solution Approach 1:
The controller applies different prohibition period lengths to different passengers based on their individual preferences. By detecting whether a passenger prefers lane change, the system creates localized control parameters tailored to each user, providing frequent proposals for those who want them and fewer proposals for those who don't
Solution Approach 2:
The controller changes the prohibition period parameter based on detected passenger preference. When a passenger who prefers lane change is detected, the controller reduces the prohibition period to increase proposal frequency. When a passenger who does not prefer lane change is detected, the controller maintains a longer prohibition period to reduce unnecessary proposals
Data Source
AI summary
A driving assistance method causes a controller to perform processing of making a proposal of a lane change to a passenger when an index value based on relative speed of a preceding vehicle with respect to an own vehicle is less than a threshold value and canceling the proposal of the lane change when a lane change execution condition is not satisfied. The controller performs processing including: accepting setting of the threshold value; and not presenting a lane change proposal after the proposal of the lane change is canceled depending on the travel environment until a set time elapses from a time point when the proposal of the lane change is canceled, even when the index value is less than the threshold value, and the set time is set to a longer time when the threshold value is high than when the threshold value is low.