European Union Agency for Railways

Reference Document Database (RDD)

The Contact Us form (withing each FAQ item) should be used to submit general questions concerning the applicable legal framework and the certification/authorisation procedure. Specific questions about future or on-going applications are out of the scope of the Contact Us webform and will not be addressed by the Agency. We advise you to ask to the appointed Project Manager of the authorising entity in such case (NSA or ERA). You can always request a Chargeable Service to the Agency. Further details on chargeable services can be found in the website via the following link. 

The Contact Us form should be used to submit general questions concerning the applicable legal framework and the certification/authorisation procedure.
Specific questions about future or on-going applications are out of the scope of the Contact Us webform and will not be addressed by the Agency.
We advise you to ask to the appointed Project Manager of the authorising entity in such case (NSA or ERA).
You can always request a Chargeable Service to the Agency. Further details on chargeable services can be found in the website via the following link. 

The Reference Document Database (RDD) is a public register providing public access, without registration, to the National Technical Rules (and their classification) published by the Member States.

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RDD provides a free subscription to the publications via the home page, just above the list of publications:

  • RDD Publications RSS Feed
  • Subscribe e-mail for notification of publications.
Contact Us

There are two main possibilities:

  • for online consultation, please access from the RDD menu (Part II - NRD\National Technical Rules) which displays the NTR search page, select the desired filtering options and press the ‘Search’ button
  • for offline consultation, please access from the RDD menu (Reports), select the desired report from the provided list (e.g. List of National Technical) and after selecting the desired parameters for the report, press the ‘View Report’ button. After execution, the report can be saved (we recommend MS Excel format) for offline consultation.
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