Do-iT - data optimisation for integrated telematics

Do-iT (data optimisation for integrated telematics) is a project, promoted by the German Federal Ministry of Research and Technology,
dealing with traffic data acquisition by using mobile phone data and applications of these so-called Floating Phone Data (FPD) within the context of transport planning.
The emphases of the IIGS are calculations of way-trajectories by using mobile phone positioning- and map matching techniques and accompanying quality management.

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Do-iT: Data optimisation for integrated Telematics

Duration: 2005 April – 2009 April
Promotion: German Federal Ministry of Research and Technology (BMBF) within the scope of the research-initiative traffic-management 2010

Partner:

  • DDG Gesellschaft für Verkehrswesen mbH
  • Ministry of the interior of the federal state of Baden-Württemberg
  • State capitol of Stuttgart
  • City of Karlsruhe
  • Chair of traffic-planning and traffic-control systems, University of Stuttgart
  • Institute for Applications of Geodesy to Engineering, University of Stuttgart

Aim of the Project:

Within the scope of this project, official and commercial data-sources for acquisition of the traffic situation are to be optimised. The ambition is to generate currently updated, inquiry-adapted estimations and prognoses of the traffic situation for collective network control and individual route recommendations.

Nature of Problem:

As a measure of actual traffic-demand on road network the source-aim-connections are currently detected by using actual recorded ways. The crucial point is the additional use of Floating Phone Data (FPD). FPD is about positioning and speed information of vehicles, generated from mobile phone data which were made anonymously. These informations are supposed to provide additional knowledge for the actual traffic situation, helping to i. a. shorten the time for traffic jam announcement or improving the prediction of traffic jam. The applications of FPD within the field of traffic control and traffic guidance are to be demonstrated within different test scenarios and evaluated with respect to the quality of the detected traffic situation, the effect on it, and potential business segments.

The contribution of the IIGS can be classified as follows:

  • Location of mobile phones and route generation by using map matching techniques
  • Identification of active motorists
  • prozessbegleitendes Qualitätsmanagement 

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Figure: System architecture of FPD-server (© iigs)

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:

Prof. Dr.-Ing. habil. Volker Schwieger
Dipl.-Ing. Alexander Beetz