Xiaomi Auto has patented a new vehicle safety system that warns drivers when their speed is dangerously high relative to surrounding traffic, even if they aren’t breaking the law. Published on November 14, 2025, the patent titled “Vehicle Overspeed Alert Method, Device, Vehicle, Storage Medium, and Program Product” details a system designed to improve safety by recognizing that speed alone isn’t always the best measure of risk.
The Problem with Traditional Speed Alerts
Current speed monitoring systems typically only alert drivers when they exceed legal speed limits. Xiaomi argues that this approach is insufficient because a vehicle traveling much faster than surrounding traffic poses a significant hazard even within legal limits. Imagine driving at 65 mph on a road where everyone else is going 45 mph: you’re still a danger, even if you’re not speeding.
How the Xiaomi System Works
The patented system uses sensors to gather data about objects moving around the vehicle. It then identifies specific types of objects as reference points (other cars, pedestrians, cyclists) and calculates the vehicle’s speed relative to them. If the relative speed exceeds a pre-set threshold, the driver receives a warning.
Adapting to Different Environments
The system isn’t one-size-fits-all. The overspeed alert threshold can be adjusted based on the road type or area. For example:
- Densely populated areas (schools, construction zones): Lower thresholds, as even a small speed difference can be dangerous.
- Highways: Higher thresholds, allowing for more natural speed variations.
This adaptability means the system can provide more relevant warnings in different driving conditions.
Warning Delivery Methods
The patent suggests multiple ways to alert the driver:
- Visual warnings: Displayed on the central control screen.
- Audio alerts: Delivered through text-to-speech functionality.
The goal is to provide real-time feedback when the vehicle’s relative speed exceeds a safe range.
Why This Matters
This patent highlights a shift in automotive safety thinking. Traditional systems focus on absolute speed, while Xiaomi’s system acknowledges that risk is often determined by how much faster a vehicle is moving compared to its surroundings. This is particularly important in areas where traffic is slow or unpredictable.
The system doesn’t aim to replace legal speed limit warnings, but rather to add another layer of safety by addressing the dangers of excessive relative speed. The focus on context and environment suggests a more nuanced approach to driver assistance.
The patent demonstrates a proactive approach to road safety, prioritizing relative risk over absolute speed, and adapting to changing driving conditions. This could lead to more effective driver warnings and a reduction in accidents
