Automation in road traffic is reshaping our future lives, and mobility. Autonomous cars require new approaches from a road operator in all activities, including traffic management. Next generation of traffic management should go hand in hand with the development of autonomous cars via open road tests. An ongoing Hungarian research project is focusing on realizing a transport ecosystem using state-of-the-art technology to develop a comprehensive solution to support autonomous vehicles in cooperation with the infrastructure. The solution builds up an external environment model in the cloud. The system will utilize all information from both vehicle and infrastructure side by fusing data from both sources together in a cloud based, real time digital twin. The scope of the project is to provide a platform for road infrastructure related cloud-based services for connected and automated vehicles. The new test environment is going to be a perfect location to simulate and evaluate the effects of Connected and Automated Vehicles (CAV) on traffic management.