Detecting an illegally parked vehicle aims to prevent car crashing between parked and other vehicles. The main objective of this paper is to identify the unauthorized parker who was parked in the private property and notify those owners. Here in this radio detection and ranging (RADAR) systems electromagnetic waves can recognize the speed, range, altitude or direction of objects, either fixed or in motion. This system consists of Arduino microcontroller, ultra-sonic sensor, servo motor, and some java applications to map the electromagnetic waves. This system can be built by connecting the ultrasonic sensors to the Arduino microcontroller’s input/output pins and servo motor is also connected to the Arduino microcontroller pins. Then both ultrasonic sensor and servo motor are clipped over the Arduino microcontroller together so that servo motor can rotate from right to left through an angle of 180. This experiment results show that the proposed framework is efficient and robust to detect an illegally parked vehicle.