CAUS is working on the ADAS feature driving through multiple level freeway interchanges. This endeavour presents new challenges to the digitalization of the sensor, road, smart traffic flow, and the environment. Different ways of approaches were explored to reach the balance of time and performance. Given the current PreScan capability and toolchain, CAUS has combined the automatic data processing with necessary human interaction to enable control engineers and perceptions engineers to verify and validate the design on the computer. A smart traffic flow was also introduced to evaluate the robustness and sensitivity to various factors.