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MAIDS : Motorcycle Accidents In Depth Study

MAIDS is the most comprehensive in-depth data currently available for Powered Two-Wheelers (PTWs) accidents in Europe. The investigation was conducted during 3 years on 921 accidents from 5 countries using the OECD common research methodology.

ACEM, the European Association of Motorcycle Manufacturers, lead the MAIDS study supported by a group of 9 partners. MAIDS was co-funded by the European Commission.


Within five European countries, five areas were identified due to their representativity of the PTW accident patterns. Each sampling area was handled by a team appointed by the MAIDS management group. A total of 921 accidents cases were investigated, each using a questionnaire with 2000 variables. The aggregate database that was so generated forms the basis for the MAIDS report.

The full study in PDF format can be downloaded after registering by clicking on the DOWNLOADS button on the left menu.

What's new:

April 2009 - Version 2.0 of the MAIDS report is now available. It contains a new presentation of the data with a split between mopeds (L1 vehicles) and motorcycle (L3) in both chapters, chapter 3.0 General Accident Characteristics and Chapter 10.0 Rationale for Action.

  • - Multivariate analysis on Fatal Accidents describing the results of a multivariate analysis of the in-depth motorcycle accident data collected during the MAIDS project. Data have been presented according to all powered two wheeler (PTW), as well as L1 and L3 vehicle categories where appropriate.
  • - Presentation of the MAIDS Report with the latest updates

Go to the [download center]

October 2008 - TRL published a "Comparative analysis of motorcycle accident data from OTS and MAIDS". You can download the full report [here]

Version 1.3 of the MAIDS study has been released. You can download the updated MAIDS report and track the changes by clicking [here].

This site has been fully redesigned to give a better overview of the MAIDS study easing navigation.


The MAIDS database is available to external research projects. If you are a researcher or a road safety analyst and you would like to have access to the MAIDS database, please contact ACEM.