Project Do-iT

Data optimisation for integrated telematics

Supported by the Federal Ministry of Education and Research (BMBF)

The project aims to optimize official and commercial data sources for road traffic data collection.
The aim is to provide continuously updated, demand-adjusted traffic condition estimates and forecasts for collective network controls and individual route recommendations.
 

As a measure of the current traffic demand in the road network, source-destination relationships are continuously determined via currently recorded journeys. The key point is the additional use of floating phone data (FPD). These are position and speed information of vehicles generated from anonymized mobile data. This information should provide additional knowledge about the current traffic situation, which among other things can shorten the reporting time for traffic jams or improve congestion forecasts. The applications of FPD in the field of traffic control and steering are demonstrated on different pilots and evaluated with regard to the quality of the determined traffic situation, the traffic effect and the possible business fields.
 
The contributions of the IIGS can be classified as follows:
 
  • Mobile location and route generation using map matching techniques
  • Identification of active road users
  • Process-accompanying quality management

Proceeding:

For the supply of FPD trajectories of active motorists are to be generated. For this purpose location algorithms are to be developed, combining methods of mobile phone location and map-aided positioning.

For identification of active motorists methods of cluster-generation, the analysis of time series and recursive filtering are applied. Furthermore geo-data were consulted in order to find more decision criteria by using logical linkages to the road network. Besides a selection of the active motorists the mobile phones were allocated to specific vehicle classes (car, lorry, bus, rail vehicle etc.).

The map matching technique defines the logical reference to the digitally stored road network and increases positioning quality. Therefore the method of shape-comparison (map matching) is used and expanded by methods of consideration multiple alternative routes and their statistical evaluation. The generated trajectories include the geometry with logical linkage to the road network, a chronological description, as well as a classification to the means of transportation.

All described activities are connected to a continuous, process accompanying quality management. Based on an appropriate quality model, all generated data and information within the whole process-chain are to be evaluated with respect to the quality aspect. These evaluations generate the basis for quality assurance arrangements for error detection and control, providing an adequate quality description of data for the use of FPD.

Furthermore the IIGS is significantly involved in the required specifications of various data models and interfaces, the transfer and filing of the mobile phone data, the assembling of the FPD-server, as well as the project evaluation.

Contact:

Dieses Bild zeigt Metzner
Dr.-Ing.

Martin Metzner

Deputy Director

To the top of the page