Car accidents causes can mostly be connected to driver distraction or misjudgement. For this reason, the development and implementation of vehicle safety systems have been grown, especially in the last decades, making Advanced Driver Assistance Systems (ADAS) fundamental to improve road safety. ADAS are a first step towards autonomous vehicles and as these systems are becoming more complex and safety critical, it is important to analyse the test methods used to validate them.The aim of this thesis is to examine how to test ADAS, and in particular Adaptive Cruise Control (ACC) and Autonomous Emergency Braking (AEB), by considering aspects such as suitable test environments and traffic scenarios, verification and validation techniques.