Traffic Incident Verification Through TMC–Sensor Location Matching
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Solution Overview
Problem
Navigation and mapping service providers face challenges in accurately verifying road incident reports from third-party sources due to differences in location referencing schemes, which affect the efficiency and accuracy of traffic incident reporting necessary for autonomous driving applications.
Innovation Solution
A system that fuses traffic message channel (TMC) messages with vehicle sensor data using a node/link representation as a translation layer to verify traffic incidents by matching TMC location codes and offsets with geographic database road links and vehicle sensor data points, enhancing the accuracy of roadwork and other traffic incident reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If TMC messages with high coverage are used for road incident reporting, then the quantity of incident reports is improved, but the measurement precision of location and time parameters deteriorates
Solution Approach 1:
The patent introduces an intermediary verification system that uses sensor data from consumer vehicles as a mediator to validate TMC incident reports. The system compares TMC data with independent sensor observations (image data of lane markings, vehicle sensor data) to verify the accuracy of location and time parameters, thereby resolving the contradiction between high coverage and low precision.
2Device complexity
If direct comparison between TMC data and sensor data is performed without translation, then the device complexity is reduced, but the difficulty of detecting and measuring increases due to different location referencing schemes
Solution Approach 1:
The patent employs a translation layer that converts TMC location codes and offsets into a common coordinate system that can be directly compared with sensor data. This intermediary translation mechanism resolves the incompatibility between different location referencing schemes while maintaining system feasibility.
Solution Approach 2:
The system transforms TMC parameters (location codes, offsets) into different parameter representations (geographic coordinates, map road links) that are compatible with sensor data. This parameter transformation enables direct comparison between TMC incident reports and vehicle sensor observations.
Data Source
AI summary
An approach for traffic incident verification involves receiving a traffic message channel (TMC) message indicating a traffic incident. The TMC message indicates an extent of the traffic incident in a road graph using TMC location code(s)/offset(s). The approach also involves matching the TMC location code(s)/offset(s) to a first set of map road link(s) and offset(s) of a geographic database, determining sensor data collected from vehicle(s) travelling within the road graph. The sensor data indicates the extent as location point(s) of topology segment(s) (TSs) and TS offset(s), matching the location point(s) of the TS(s) and TS offset(s) to a second set of map road link(s) and offset(s) of the geographic database, determining an intersection set between the first and second sets, and initiating a confirmation of the traffic incident reported in the TMC message based on the sensor data of the location point(s) of the TSs in the intersection set.