Lane Change Assistance Using Driver Reaction Time Adaptation
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Solution Overview
Problem
Existing driver assistance systems for lane changes on multi-lane roads issue lane change indications at a fixed time, which may not account for individual user reaction times, leading to potential safety issues, especially in situations requiring quick lane changes like exits with short deceleration lanes.
Innovation Solution
A method and system that determine an individual user's reaction factor by measuring total reaction time and adapting the indication time based on user-specific reaction times, alertness, and position, ensuring timely lane change maneuvers by issuing the indication earlier for slower responders and adjusting for alertness and tiredness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed indication time is used for lane change maneuvers, then the system operation is simple, but the safety is compromised due to not accounting for individual user reaction times
Solution Approach 1:
The system performs preliminary measurement of the user's reaction time during a calibration phase before actual lane change maneuvers. This preliminary action allows the system to store individual reaction time data that can be used to adapt indication timing in subsequent operations, thereby improving safety without adding complexity during critical maneuvers
Solution Approach 2:
The indication time is made dynamic rather than fixed. The system adapts the indication timing based on the stored individual reaction time of each user, adjusting the moment when the lane change indication is issued to account for personal response characteristics, thus improving safety while maintaining reasonable system simplicity
2Manufacturing precision
If the indication time is advanced for slower responders, then the lane change execution becomes timely, but the timing precision becomes more complex
Solution Approach 1:
The system changes the timing parameter of the lane change indication based on the user's measured reaction time. By adjusting this single critical parameter rather than redesigning the entire control logic, the system achieves precise timing adaptation while keeping the overall system relatively simple
3Reliability
If individual reaction factors are determined and indication times are adapted, then the lane change safety improves, but the measurement and determination processes become more complex
Solution Approach 1:
The system performs self-calibration by automatically measuring the user's reaction time during normal operation without requiring external testing equipment or complex measurement apparatus. The calibration process is integrated into the existing lane change assistance functionality, allowing the system to determine individual reaction factors through its own operational data
Data Source
AI summary
A method for assisting a user of a vehicle during the maneuvering of the vehicle on a multi-lane road includes receiving a travel command to maneuver the vehicle from a second lane of the road across a first lane of the road onto an exit of the road, searching for a free gap for the vehicle between road users in the first lane, issuing an indication to the user to actuate an operator control element to initiate a lane change maneuver from the second lane into the free gap in the first lane, wherein the indication is issued at a certain indication time, determining a total reaction time which describes a duration between the issuing of the indication and the initiation of the lane change maneuver, determining an individual reaction factor of the user based on the total reaction time and adapting the indication time for subsequent maneuvering of the vehicle on the basis of the individual reaction factor.