Roadwork Zone Prediction Using Map and Multi-Vehicle Sensor Data

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Solution Overview

Problem

Current autonomous and driver-assist vehicle systems are unable to reliably predict or respond to roadwork zones, which is crucial for vehicle safety and navigation, especially in autonomous driving scenarios.

Innovation Solution

A computer-implemented method and system that utilizes a trained machine learning model to predict the presence or absence of roadwork zones by processing map data, sensor data, and ground truth data, including indicators such as roadwork announcement signs, speed limit signs, and lane markings, to determine the start and end of roadwork zones, and adjust autonomous driving modes accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If current autonomous vehicle systems use traditional sensor-based detection methods, then they can identify visible roadwork signs and markers, but they fail to reliably predict roadwork zones ahead of time

Engineering Contradiction:
Improvedetection accuracyVSAvoidprediction lead time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The system performs preliminary detection and prediction of roadwork zones using sensor data collected before the vehicle reaches the actual roadwork area. By analyzing sensor data from multiple vehicles and processing it through machine learning models, the system predicts roadwork zones in advance, allowing autonomous vehicles to prepare appropriate responses before encountering the actual construction zone.

Inventive Principle:
Principle #10Preliminary action

2Reliability

If the system collects and processes sensor data from multiple vehicles to improve prediction accuracy, then prediction reliability increases, but system complexity and data processing requirements increase

Engineering Contradiction:
Improveprediction reliabilityVSAvoidsystem complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The system creates a universal prediction model that serves multiple functions: it processes sensor data from various vehicle types, handles different sensor configurations, and provides predictions for multiple vehicles simultaneously. The machine learning model is designed to be agnostic to specific sensor implementations, allowing the same system to serve diverse autonomous vehicle platforms with varying sensor suites.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system introduces a centralized server as an intermediary that receives sensor data from multiple vehicles, processes it through machine learning models, and distributes predictions back to vehicles. This intermediary architecture simplifies individual vehicle systems by offloading the complex data aggregation and model training tasks to a centralized infrastructure, reducing on-vehicle computational requirements.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Measurement precision

If the system uses multiple data sources including map data, sensor data, and ground truth data, then prediction accuracy improves, but data processing time and computational resources increase

Engineering Contradiction:
Improveprediction accuracyVSAvoiddata processing time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The system performs preliminary data processing and model training in advance using historical sensor data and ground truth data. By pre-training machine learning models with extensive datasets and pre-processing map data for relevant road segments, the system reduces real-time processing requirements. When a vehicle needs a prediction, the heavy computational work has already been completed, and only inference is required.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system focuses data collection and processing efforts on local road segments that are relevant to each vehicle's current location and route. Rather than processing all available data globally, the system identifies and processes only the sensor data and map data pertinent to specific road segments ahead of the vehicle's path, reducing unnecessary computational overhead while maintaining prediction accuracy for relevant areas.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS11681294B2Method and system for prediction of roadwork zone
Publication Date: 2023.06.20 HERE GLOBAL BV
  • US11681294B2 patent drawing
  • US11681294B2 patent drawing
  • US11681294B2 patent drawing

AI summary

A computer-implemented method for prediction of a roadwork zone on at least a second road segment is provided. The method comprises retrieving at least one of map data or first sensor data for at least a first road segment. The method also comprises retrieving ground truth data for at least the first road segment, the ground truth data indicating a true presence or a true absence of a roadwork zone on the at least first road segment. The method further comprises receiving second sensor data associated with the at least second road segment. The method further comprises generating roadwork zone data of the roadwork zone on the at least second road segment, based on the at least one of map data or the first sensor data, the ground truth data, and the second sensor data.