Internet of Things (IOT) used for connecting things present in the physical world with sensors and connection them to network through wired or wireless means. IOT evolves current internet into network of interconnected objects, such as sensors, parking meters, energy measuring devices and actuators. For generating vast amount of data, these network devices have the ability to compute sense and interact with the surroundings.As Intelligent car parking system are an important part of the Intelligent Transportation Systems (ITS) with its primary purpose is to find, allocate, reserve and provide the best car parking lot for the user and Road traffic congestion detection and management has been challenge and several countries have come up with the new concepts and ideas to detect congestion.