## 1 Introduction  
Ensuring good Quality of Life (QoL) to every human is the fundamental task of the urbanization process, which comprises social development, economic development, and environmental protection [1]. Consequently, rapid population growth can be noticed today in urban areas. According to the United Nations (UN) [2], urban areas were the home of 55% of the global population in 2018 and will shelter 68% of people in 2050, and by the year 2050, an estimated 416 million Indians will live in cities [2]. Now the time has come to find sustainable solutions that provide good quality of life in every aspect of living and minimize upcoming challenges. A few decades ago, the Smart City emerged as the most prominent solution to all the urbanization problems and delivered optimal and efficient results with the aid of Information and Communication Technology (ICT) in various city facets. Though the facilitation of ICT in the smart city is not the only reason for a city to be smart [3], there are many other urban models that smart cities require to be interpreted as fully functional smart cities i.e., information city, digital city, and telicity [4, 5]. To establish a highly urbanized population, researchers have proposed some models of the future smart city in which sustainability, technology, safety, comfort, and connectivity play a significant role to make the city smart and to provide a good quality of life to the people [1]. According to [6], the city must follow sustainable development, which is defined as making improvements to the city's environmental quality. Context-aware economics and governance, as well as inclusiveness, are all attributes of a city's residents. The notion of connecting everything to the internet through smart devices, called the Internet of Things (IoT), has emerged as a game-changer for smart cities. According to [7], it has been predicted that there will be 22 billion active IoT devices by 2025, while the current rate of IoT devices at the time of analysis was 7 billion in 2018. Further advancements in related technologies such as machine-to-machine (M2M) communication, wireless sensor networks (WSN), and Ubiquitous Computing (UC) enhance the IoT network. These connected devices exchange authorized information with one another to support contextual decision-making [8]. An intelligent transportation system powered by a Vehicular Ad hoc Networks (VANETs) is one of the main goals of the smart city. VANETs improve the overall driving experience and traffic efficiency of the smart city. In the real world, VANETs minimize accident risk and traffic jams on the road by providing emergency message sending and traffic forecasting, respectively. VANETs play a vital role in autonomous cars by giving accurate information about road conditions. Furthermore, fault detection, traffic security, resource scheduling, energy consumption reduction, etc., are some of the services that VANETs provide [9]. A new concept called the Internet of Vehicles (IoV) has recently emerged to overcome the limitations of VANETs. IoV is an extension of VANETs. Although IoV and VANETs share the same goal, VANETs do not have the processing power to deal with large amounts of global information. Moreover, VANETs do not have the capability of analyzing, processing, and evaluating the global information that is acquired from the many vehicles that are a part of the network, since they are not designed to do so [10]. VANETs are designed to perform small tasks, like accident avoidance, jam avoidance etc. We will discuss IoV more in our future work. Data transmission and communication between vehicles and roadside infrastructure are the backbones of VANETs, which use several communication technologies, such as mobile networks, vehicle networks, and short-range communication [9], as shown in Figure 1.  
There is no excuse to refuse the importance of cloud computing in VANET.