Over 70 test sites in Europe and elsewhere were identified through personal contacts and knowledge of the project team, web searches and discussion with the CEDR CAD group and industry contacts. The output of this work was a catalogue of connected and automated driving test sites, identifying and categorising 37 test sites in Europe (Deliverable 2.1). The sites are also presented in a Google map page which gives the locations of the test tracks and approximate extent of road-based test sites.

A preselection of 16 test sites for further investigation was made by the project team and discussions with the CEDR CAD team at a workshop in Tallinn. These sites were prioritised based on factors including; provision of information to the team in the first phase, the type of track or roads involved (excluding low speed pods in campus environments for example) and sites or projects that would be operational beyond the lifetime of the project. Final agreement was made, and visits made to the following sites by members of the project team, CEDR project officers and representatives of NRAs:

• Horiba MIRA, Midlands, UK,
• Alp.Lab, Graz, Austria,
• TRANSPOLIS, Lyon, France.

Discussion were also held with the Midlands Future Mobility test road to learn about the plans for this 20-year project. The findings are presented in Deliverable 3.1.

Following this work, the project team took the learnings from the test sites initially categorising the test sites by road / track type, for example urban, interurban, simulations, detailing the practical implications for each and noting test sites in each category and occasions where NRAs were directly involved. The sites where priority areas for NRAs (safety, traffic efficiency, customer service, maintenance and construction and data / C-ITS) were discussed and implications for NRAs presented. In the absence of data provided directly provided by test sites, the impacts of CAVs, CVs and AVs for these priority areas were detailed in relation to potential impacts, benefits, or infrastructure requirements for NRAs in the future. This was supplemented by four cases with more in-depth analysis to provide a concrete overview of activities at specific sites or projects addressing aspects that align with the work of NRAs. These were:

• Highways England: Construction and maintenance vehicles, work zone safety,
• TRANSPOLIS test site: cyber security and data case study and self-driving vehicle cyber security testing capabilities,
• ENSEMBLE truck platooning project, and
• ZENZIC: CAVs cyber security testing capabilities

From the work undertaken, a series of findings were made, which are presented joint Deliverable 4.1 and 4.2. A

From the findings developed, a series of recommendations were made. The original plan was that these would be discussed with the CEDR CAD group at the TRA conference in Helsinki and/or a CEDR group meeting in Bern, however the outbreak of COVID19 prevented this from happening. Instead, three online workshops were held with representatives of the CEDR CAD group, project officers, research institutes and interested experts and a fourth workshop with the CEDR CAD group only. Following an overview of the work undertaken on the project, the MURAL whiteboard tool was used to present the recommendations, clarify or add new one, vote on those of highest interest, and finally to discuss and categorise the difficulty of implementation of the recommendations.

In the areas investigated, there are a variety of simulation, visualisation, test tracks and test beds that address NRA needs across Europe. One area that is possibly lacking is road trials that traverse international boundaries and work on this should be undertaken to ensure interoperability of systems across Europe. Depending on specific NRAs needs there is a variety of testing scenarios available. NRAs can become mutual partners and participate in consortia together with the OEMs and other relevant data and service providers to be able to obtain and exchange data and best practices. Since the test site performance and safety information resulted from specific tests and trials undertaken by each site is typically confidential it is proposed that NRAs join such initiatives or join ventures and become a mutual partner. More open communication from all parties could lead to the development of projects that address common areas of interest such as safety, traffic efficiency and customer service, and help accelerate the deployment of connected and autonomous vehicles.