TIARA has planned its methodology to respond to all of the research questions presented in the call text, focus on the critical elements of the digital infrastructure related to digital road operations and their development, deployment and operations issues, and produce the outputs.

The methodology of TIARA builds on close liaison with the CEDR experts, other expert organisations, individuals, and third-party stakeholders, and the sister projects of the same call. The methodology is embedded in the TIARA structure, as visualised in the following figure.

Our work is divided into a set of specific work packages:

WP2 will deliver practical guidance for the implementation of a Public Key Infrastructure (PKI) for C-Roads. The purpose is to assist the NRAs in understanding how they can implement the proposed European C-ITS trust model. The work will include an overview over state-of-the-art and existing best practices, an analysis of issues and challenges, in addition to the guidance.

WP3 will deliver practical guidance on the responsibilities and best practices, which road authorities must be conscious of, and their legal and ethical ramifications, in using C-ITS data. The work will include responsibilities, accountability, limitations, uses, transparency, inclusivity, and learnings from other sectors.

WP4 will deliver practical recommendations about the transparency and trust concerning data use by road users and road authorities, ensuring both lawful and responsible behaviour. This revolves around openness of the primary and secondary uses for all types of data, information, patterns, and characteristics, which can be traced back to road users and must therefore be protected.