Wrong-way Driver Warning via Segmented Map Updates
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Solution Overview
Problem
Current methods for warning vehicles about wrong-way drivers are delayed and non-targeted, often broadcasting globally rather than specifically to relevant vehicles, and fail to account for the current location and route of recipient vehicles, leading to inefficiencies in alerting drivers to potential hazards.
Innovation Solution
A method where a stationary server device receives wrong-way driver data, divides a digital road map into partial areas, and sends updated map data to recipient vehicles, allowing them to assess relevance and implement protective measures only if the wrong-way driver poses a threat, using relevance criteria such as route intersection and proximity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If warning messages are broadcast globally via TMC channel or radio channels, then all vehicles in range receive the warning, but the warning is not targeted to relevant vehicles and causes unnecessary alerts
Solution Approach 1:
The digital road map is divided into multiple partial areas (tiles) of predetermined size. The server device identifies which specific partial area contains the wrong-way driver and only updates map data for that specific area, rather than broadcasting to all vehicles in a large geographic range. This segmentation enables targeted information delivery to only those vehicles in the relevant area.
Solution Approach 2:
The system provides different information to different vehicles based on their location and route. Each recipient vehicle receives updated map data only for partial areas that are relevant to its current position and planned route, creating a localized information delivery system that adapts to each vehicle's specific context.
2Reliability
If warning messages are sent with considerable delay via TMC channel, then the broadcast reaches all vehicles, but the warning arrives too late to be useful
Solution Approach 1:
Recipient vehicles request updated map data proactively from the server device before they would need the information. The server device maintains updated map data with wrong-way driver information ready for distribution. This preliminary preparation of information allows rapid delivery when vehicles request it, reducing the time delay compared to waiting for periodic broadcasts.
Solution Approach 2:
The system implements a request-response mechanism where recipient vehicles send requests to the server device when they need updated map data, and the server device responds by providing the specific partial area data. This feedback loop ensures information is delivered on-demand with minimal delay rather than through scheduled broadcasts.
3Reliability
If the complete road map is transmitted to all recipient vehicles, then all vehicles have full map data, but unnecessary data is transmitted to vehicles that do not need it
Solution Approach 1:
The system extracts and transmits only the specific partial area of the road map that contains the wrong-way driver information, rather than transmitting the complete road map. The server device identifies the relevant partial area and sends only that extracted portion to recipient vehicles, significantly reducing communication data volume and energy consumption.
Solution Approach 2:
The system transmits only the necessary portion (partial area) of the road map data that is relevant to the wrong-way driver location, rather than transmitting excessive complete map data. This partial action approach provides sufficient information for vehicles to assess relevance without the overhead of complete map transmissions.
4Reliability
If warning systems alert all vehicles in range, then no vehicle is missed, but vehicles not at risk receive unnecessary alerts causing driver distraction
Solution Approach 1:
Recipient vehicles perform a preliminary relevance check using their on-board road map before implementing protective measures. They compare their current position, route, and the wrong-way driver information to determine if they are actually at risk. This preliminary assessment filters out vehicles not at risk before they receive distracting alerts, maintaining reliability for at-risk vehicles while reducing distraction for others.
Data Source
AI summary
The present application provides a method for notifying at least one receiver vehicle about a wrong-way driver vehicle, wherein a stationary server device receives from the wrong-way driver vehicle wrong-way driver data describing its current position. The invention provides that the server device provides a digital road map, which is divided into sub-areas of pre-determined size, and selects, in the road map based on the wrong-way driver data, that sub-area in which the wrong-way driver vehicle is located, and updates the map data of the selected sub-area by means of the wrong-way driver data and transmits the updated map data to the at least one receiver vehicle, and the at least one receiver vehicle enters the received map data into an on-board digital road map and checks on the on-board road map whether the wrong-way driver vehicle for the receiver vehicle fulfills a pre-determined relevance criterion, wherein if the relevance criterion is met, a protective measure is performed in the receiver vehicle.