Automated Traffic Light Allocation Using Vehicle Trajectories

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Solution Overview

Problem

Current systems for autonomous and partially autonomous vehicles lack an automated method for allocating traffic lights to specific traffic lanes, which limits their ability to navigate complex intersections efficiently and requires manual intervention.

Innovation Solution

A method that uses sensors like cameras and LIDAR to register vehicle trajectories and traffic light switching states, allowing for automated allocation of traffic lanes to traffic lights, even without directional markers, and enables data collection from multiple vehicles to update traffic light models for efficient navigation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Extent of automation

If manual allocation of traffic lights to traffic lanes is used, then accuracy of traffic light allocation can be maintained, but productivity and automation level are reduced

Engineering Contradiction:
Improveautomation of traffic light allocationVSAvoidaccuracy of traffic light to traffic lane allocation
Core Design Contradiction:
Extent of automationVSManufacturing precision

Solution Approach 1:

The system uses feedback from detected vehicle trajectories to automatically allocate traffic lights to traffic lanes. Vehicles detect their own trajectories and trajectories of other vehicles at intersections, transmit this data to a server, and the server uses the accumulated trajectory information to automatically determine which traffic light controls which traffic lane, eliminating manual allocation while maintaining accuracy through data-driven decisions

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The system enables self-service by allowing vehicles to automatically detect and report their trajectories and the traffic light states they encounter. Each vehicle independently contributes to the collective data set that enables automatic traffic light allocation, with the server synthesizing this self-reported information to create accurate allocations without human intervention

Inventive Principle:
Principle #25Self-service

2Reliability

If directional markers on road are used for allocation, then traffic light to traffic lane allocation can be achieved, but reliability is reduced when markers are missing or covered

Engineering Contradiction:
Improvereliability of traffic light allocationVSAvoiddependence on road markings
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The system introduces vehicle trajectories as an intermediary element to replace direct reliance on road markings. Instead of using directional arrows painted on the road, the system uses the actual paths taken by vehicles (detected by sensors) as the basis for allocation. This intermediary approach maintains reliability because vehicle trajectories are continuously observable and do not depend on the physical condition of road markings

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The system replaces the mechanical/visual system of road markings with an electronic/sensor-based system. Rather than relying on painted directional arrows that can be worn or covered, the system uses sensors (cameras, LIDAR) to detect vehicle positions and trajectories, substituting a fragile visual indicator with a robust electronic detection mechanism

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Productivity

If data from multiple vehicles are collected and processed, then productivity of map updating is improved, but device complexity and data processing requirements increase

Engineering Contradiction:
Improvespeed of traffic light model updatingVSAvoidcomplexity of data collection and processing system
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The system segments the data collection and processing tasks across multiple independent vehicles and a centralized server. Each vehicle independently detects trajectories and transmits data, while the server segments the processing work by accumulating data from multiple sources and synthesizing it into updated traffic light models. This segmentation enables parallel data collection that improves productivity without requiring any single vehicle to handle the full complexity

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The system achieves universality by creating a multi-functional platform where vehicles serve multiple purposes: they detect their own trajectories, detect trajectories of other vehicles, detect traffic light states, and transmit all this data to the server. This universal approach allows the same infrastructure to collect comprehensive data from multiple sources, improving productivity through data aggregation while distributing the processing complexity across the network

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

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Enables efficient and automated setup of highly automated driving maps for large areas, including complex intersections, reduces fuel consumption, optimizes travel time, and enhances driving comfort by predicting traffic light phases and vehicle movements.

Implementation Method 1

A trajectory of at least one vehicle traveling ahead is registered by at least one sensor such as a camera or a LIDAR (light detection and ranging) sensor

Methodology Applied
Scientific EffectLIDAR: LIDAR

Data Source

PatentUS11335188B2Method for automatically producing and updating a data set for an autonomous vehicle
Publication Date: 2022.05.17 ROBERT BOSCH GMBH
  • US11335188B2 patent drawing
  • US11335188B2 patent drawing
  • US11335188B2 patent drawing

AI summary

A method for the automatic production and updating of a data set for an autonomous vehicle, in which at least one traffic light and a switching state of the at least one traffic light are registered; at least one road marking is ascertained; a trajectory of at least one vehicle traveling ahead is registered; and the collected data are used for producing and updating a data set, and based on the at least one detected trajectory, the at least one switching state of the at least one traffic light and the at least one ascertained road marking, at least one traffic lane is allocated to at least one traffic light. In addition, an autonomous or partially autonomous vehicle is described for carrying out the method.