  The way we travel is changing rapidly, and Cooperative Intelligent
Transportation Systems (C-ITSs) are at the forefront of this evolution.
However, the adoption of C-ITSs introduces new risks and challenges, making
cybersecurity a top priority for ensuring safety and reliability. Building on
this premise, this paper presents an envisaged Cybersecurity Centre of
Excellence (CSCE) designed to bolster research, testing, and evaluation of the
cybersecurity of C-ITSs. We explore the design, functionality, and challenges
of CSCE's testing facilities, outlining the technological, security, and
societal requirements. Through a thorough survey and analysis, we assess the
effectiveness of these systems in detecting and mitigating potential threats,
highlighting their flexibility to adapt to future C-ITSs. Finally, we identify
current unresolved challenges in various C-ITS domains, with the aim of
motivating further research into the cybersecurity of C-ITSs.
