Automated Vehicle Hazard Light Feedback for Traffic Jam Safety
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Solution Overview
Problem
Existing automated vehicle systems fail to effectively manage collision risks when approaching the end of a traffic jam, particularly in assessing and mitigating rear-end and frontal collisions using hazard warning lights of preceding and following vehicles.
Innovation Solution
The method involves detecting a traffic jam ahead by analyzing activated hazard warning lights of preceding vehicles, assessing the collision risk based on these lights, and adjusting the vehicle's distance and speed to minimize collision risks, while informing occupants and activating the vehicle's hazard warning lights to alert following traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vehicle maintains a smaller distance to the vehicle ahead to improve productivity, then the time to clear the traffic jam is reduced, but the risk of frontal collision increases when the following vehicle brakes suddenly
Solution Approach 1:
The system continuously monitors the hazard warning lights of the following vehicle and dynamically adjusts the distance to the vehicle ahead based on this feedback. When hazard lights are detected, the system increases the distance to reduce frontal collision risk while maintaining productivity when hazard lights are not present.
Solution Approach 2:
The distance to the vehicle ahead is not fixed but dynamically adjusted based on the detected state of the following vehicle's hazard warning lights. The system transitions between different distance states (smaller distance for productivity, larger distance for safety) depending on the real-time situation.
2Reliability
If the vehicle increases distance to the vehicle ahead to reduce frontal collision risk, then safety is improved, but the time to clear the traffic jam increases reducing productivity
Solution Approach 1:
The system uses feedback from the following vehicle's hazard warning lights to determine when to increase distance. Distance is only increased when hazard lights are detected, ensuring safety improvement without unnecessary productivity loss.
Solution Approach 2:
The distance adjustment is applied locally and selectively - only when and where needed (when following vehicle hazard lights are detected). The system maintains smaller distances in safe conditions and increases distance only in potentially dangerous situations.
3Ease of operation
If the vehicle decelerates earlier to improve comfort, then occupant comfort is enhanced, but the risk of rear-end collision with the following vehicle increases
Solution Approach 1:
The system performs preliminary deceleration when a traffic jam is detected ahead, improving occupant comfort by avoiding sudden braking. The deceleration is initiated in advance based on detected traffic conditions rather than waiting for immediate danger.
Solution Approach 2:
The system monitors the following vehicle's hazard warning lights to determine whether to maintain smaller distance (reducing rear-end risk) or can afford earlier deceleration (improving comfort). The feedback from hazard light detection modulates the deceleration strategy.
Data Source
Figure 1~2
AI summary
The invention relates to a method for operating a self-driving vehicle (1). According to the invention, - when a traffic jam has been detected ahead of the vehicle (1), it is ascertained whether hazard warning lights (2.1) in a vehicle (2) that follows the vehicle (1) in the same lane (F1) are turned on, and if the hazard warning lights (2.1) are turned on in the following vehicle (2), a rear collision risk is assessed to be lower than when the hazard warning lights (2.1) are off.