Participant legal forms. The relevant legal forms involve (a) the forms provided by the participant and (b) the forms signed by the participant. In the first case, participants should present a valid riding license. Driver/rider licensing protocols differ between countries. For example, in the UK, all drivers must be in possession of a photo-card and paper counterpart to their license, the latter of which must be kept up to date with respect to driving penalties and restrictions. TRL are therefore able to check the validity of driving licenses without difficulty. Regarding the second type of legal forms, all participants will be required to sign a consent form and a participant agreement, which will contain details on all aspects of the study. A description of the forms signed by the participant follows: • Consent form to collect and store participant personal data. In the form it will also explain the purpose of the data collection and the participants’ rights according to the law on data privacy, • Participant agreement, which includes information on • the project, • the length of the data acquisition/vehicle loan, • the experimental protocol, • participants’ rights, obligations and responsibilities (which include also the terms of use; e.g. the expenses paid by the research institute and those that must be paid by the rider). • Authorization to use the collected data for scientific publications and presentations. In addition, the participants should be informed about their duties during the study. These include completing the questionnaires and reports, being available for the download sessions and contacting the test leader whenever a problem or accident occurs. Riders should be asked to ride safely and to keep the traffic rules, and be reminded of their own responsibility for their riding and its consequences. Lastly, the duration of the study and the responsibilities of the test leader have to be specified and the data of the support hotline provided.
