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Reporting the results of carrying out experimental seasonal adjustment of Welsh road accident and casualty data, with the aim of possibly publishing seasonally adjusted quarterly data in the future.

First published:
10 April 2012
Last updated:

The report has been produced by the Welsh Government and reviewed by the Methodology Directorate of the Office for National Statistics.

The report includes:

  • an explanation of seasonal adjustment
  • the use of seasonal adjustment with respect to road casualties
  • what breakdowns of the data are available
  • quality issues.

Statistician: Ryan Pike

Telephone: 0300 025 6415


Telephone: 0300 025 8099


Seasonal adjustment and road casualty data , file type: PDF, file size: 1 MB

1 MB
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