VTanalyzer – Assuring Fully – Automated Quality

Quality Assurance for Detector Data

Traffic control and traffic management are based, either directly or indirectly, on detector data, for example in the form of local logics directly in the traffic light controller or in the form of refined data such as traffic state. Due to the large number of detectors, however, it is not possible to monitor detectors manually.

VTanalyzer provides automated quality monitoring and assessment of detector data. It helps to identify detector faults and problems in transmission channels quickly and easily.


  • Offers highly automated quality control of your detector data
  • Runs without extensive parameterization of test procedures
  • Alerts you actively to possible faults
  • Is available as a web application on all your equipment without any installation
  • Is linked to different urban traffic control systems via standard interfaces

The assessement view shows the results of the daily quality check and allows a quick and efficient recording and analysis of faults.

VTanalyzer offers many options for the analysis of detector data and test results:

  • Numerous diagrams that are specifically adapted to the test procedures
  • Different tabular diagrams with export options
  • Filtering and sorting according to different criteria
  • Generation of comprehensive reports

VTanalyzer checks your detector data with more than 20 different test procedures.

The results of these tests are grouped together according to the following quality aspects:

  • Availability
  • Up-to-dateness
  • Correctness

Quality Assurance for Green Waves

Any once well-planned coordination can easily fall to pieces with time. VTanalyzer continuously checks the quality of the coordination and informs you of any deterioration. This check is based on the reported signal times and requires only a minimum of parameterization effort.

VTanalyzer for Green Waves:

  • Checks the coordination quality continuously and automatically
  • Indicates variances in the coordination quality due to vehicle actuated control
  • Supports the analysis of coordinated routes

Public Transport Quality Analysis

A modern web-based user interface visualizes a multitude of public transport evaluations, ranging from simple reporting point errors to driving time statistics, green time arrivals and further detailed analyses. All necessary analysis tools are available in tabular and graphical evaluations as well as map views and signal plan recorders.

As an entry point, an overview page shows at a glance whether there are problems and where more detailed investigations are worthwhile.

The existing quality analysis for detectors, signal group data and green waves is thus supplemented by a further module and expanded into a complete package.

VTanalyzer with public transport module offers the following evaluation options:

  • Visualization of the frequencies of individual reporting chain requirements (also differentiated by line and route) both in tabular form and in a diagram
  • Visualization of reporting point errors with differentiation between missing, reversed and multiple reporting points (differentiable by reporting chain, line or route)
  • Display of diagrams that compare the frequencies of individual reporting points in a reporting chain to visualize reporting point errors. The displays also allow a line-specific view of the reporting routes.
  • Display of the frequencies for arrivals when green (without waiting time). The evaluation is broken down into normal and multiple registrations (simultaneous registration of a second vehicle). The evaluation is optionally differentiated according to message chain, line or route.
  • Visualisation via diagrams of waiting times/signal loss times for public transport
  • Display of the travel time between the different reporting points of a reporting chain using diagrams. The real travel times are compared with the supplied theoretical travel times.
  • Visualization of the individual public transport messages in tabular form as well as in the form of a time-dependent diagram. The diagram visually summarizes the registrations of a message chain, so that the evaluation becomes clearer.
  • Visualization of release times in the reporting chain crossings and release distributions throughout the day in order to visualize the effects of the registrations on the control system.
  • The history of the public transport analysis results (e.g. reporting point error and number of forced logouts) can be called up over a longer period (one month to one year) and visualised as a historical curve.
  • Map view of the node in question with all signal groups displayed
  • Display of received public transport telegram data

And the special:

No additional supply effort is necessary. The supplied reporting chains are automatically read from the OIVD files generated by the traffic engineer’s workstation and used for the analysis. Supply changes are thus directly taken into account.


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