Test of Automatic Survey of ViVAtraffic

Mikko Räsänen

Research output: Book/ReportReport


Automatic survey (ASU) feature of ViVAtraffic program can automatically trace road users in video sequences and produce count and speed data. The reliability of ASU was tested by comparing radar measurements with ASU measurements driven from the same data. Tests showed that the ASU function of ViVAtraffic gives as reliable results as radar measurements. However, ASU is sensitive to unstable conditions like strong shadows. The right calibration is essential. All test results showed a tendency to a little bit higher speed values with ViVA than with radar measurements. These could be due to deficits in calibration. When ASU has started, the graphic display, acoustic signal and ASU dialog will quite soon show is everything OK in the recognition process. The speed of long and large vehicles like buses and trucks is sometimes difficult get correct.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages19
Publication statusPublished - 2004
MoE publication typeD4 Published development or research report or study

Publication series

SeriesVTT Research Report


  • Speed
  • video camera
  • reliability


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