Advanced Driver Assistance Systems (ADAS) and Autonomous Driving (AD) offer a range of economic, social, and environmental benefits. However, the European Union prioritizes the enhanced safety it brings to Intelligent Transport Systems (ITS). With the increasing complexity of ADAS/AD functionalities, platforms capable of handling extensive validation tests are needed. Conventional testing methods become impractical due to the exponential growth in integration and validation tests. Model-based approaches offer a pathway for digital disruption, enabling more efficient validation processes. Hence, the emphasis lies on executing extensive test sets and minimizing them through constructive means using correct-by-construction methodologies. To address these problems, we focus on two aspects that we identified as essential and at two distinct levels: A strategic platform that supports ADAS/AD system development through testing and validation methods, including co-simulation of AD scenarios using CARLA and Artery V2X simulators connected via a ROS network, continuous integration, and verification usage for streamlined validation processes; Establishing a highly connected and intelligent ecosystem with V2X communication infrastructure aiming at accelerating technologies and advancing infrastructure for Autonomous Driving Systems (ADS).