To reach 'Vision Free Collision' objective in smart vehicle, radar based ADAS (Automatic Driving Assistant System) are being developed worldwide. For the above requirement towards public safety this book motivates, modelling of such radar for vehicular friendship. This book is providing two ADAS modes of radar which is developed and modelled namely. ADAS1 with mode 1 which is using MVRD (Minimum Variance Distortion less Response) by switched transmit beam technique to avoid collision avoidance by detecting the target present on the road. ADAS2 with mode 2 using the PCM (Phase-comparison Monopole technique helps the driver in collision avoidance and also tracking the other vehicle. For today's vehicular driver assistance, this digital beam forming based adaptive tracking system is highly effective and can be operated for commercial use.