Automatic Speed Control for Marked Roadway Speed Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing automatic speed control systems for vehicles do not effectively adjust speed to match individual driver preferences or road conditions, leading to reduced driving comfort and safety, especially in marked stretches of roadway where subjective perceptions of speed may differ from the setpoint speed.
Innovation Solution
A method that utilizes environment sensor data and map data to identify marked stretches of roadway and adjusts vehicle speed based on pre-stored speed information, which includes speed values and changes recorded during previous driver interventions, allowing for individualized speed adjustments that account for road types, weather, and driver preferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the automatic speed control adjusts vehicle speed to the speed limit, then the legal compliance is improved, but the driving comfort deteriorates in marked stretches of roadway where drivers prefer lower speeds
Solution Approach 1:
The system applies different speed control strategies to different road segments. In marked stretches of roadway, the system overrides the general speed limit adherence with location-specific speed adjustments based on driver preferences, creating local quality variations in speed control behavior that match driver expectations for different road environments
Solution Approach 2:
The system pre-stores speed adjustment values for marked stretches of roadway in advance. When the vehicle enters these predetermined locations, the system has already prepared the appropriate speed adjustments based on historical driver behavior, enabling immediate adaptation without real-time calculation delays
2Device complexity
If the automatic speed control maintains a constant setpoint speed, then the system simplicity is improved, but the adaptability to individual driver preferences and road conditions deteriorates
Solution Approach 1:
The system automatically learns and stores driver speed preferences for different road locations without requiring manual programming or complex user input. The system serves itself by capturing driver interventions during normal operation and using this data to automatically adjust future speed control, eliminating the need for complex configuration interfaces
Solution Approach 2:
The system monitors and records actual driver interventions when they override the automatic speed control, using this feedback to build a database of driver preferences. This feedback loop enables the system to progressively adapt to individual driver behaviors while maintaining a simple operational interface
3Productivity
If the automatic speed control regulates speed to the permitted maximum, then the travel time is reduced, but the safety deteriorates in hazardous stretches of roadway such as curves, tunnels, and school areas
Solution Approach 1:
The system proactively reduces speed before the vehicle enters hazardous marked stretches of roadway by identifying these locations in advance through map data and environment sensors. This preliminary speed reduction prevents potential safety issues before they arise, rather than reacting to dangerous conditions after they are detected
Data Source
AI summary
A method for adjusting an automatic speed control of a vehicle. The method includes: receiving environment sensor data of at least one environment sensor of the vehicle and/or map data of a map representation representing the environment of the vehicle; on the basis of the environment sensor data and/or the map data, determining a speed limit for a roadway being driven by the vehicle; by means of the automatic speed control, adjusting the vehicle speed to a speed value corresponding to the speed limit; on the basis of the environment sensor data and/or on the basis of the map data, identifying a marked stretch of roadway of a roadway being driven by the vehicle; and adjusting the vehicle speed regulated by the automatic speed control to a predefined vehicle speed stored in speed information for driving over the marked stretch of roadway.