# Smart Mobility and Aspects of Vehicle-to-Infrastructure: A Data Viewpoint
## 1 Introduction  
The continual increase in the total number of vehicles is causing daily traffic congestion and accidents, which often result in serious injuries. The improper management of a critical traffic situation causes further inconvenience. The innovation discussed here is part of the Smart Mobility concept, which is becoming more and more important due to the ever-increasing intensity of traffic [1]. According to [2], up to 50% (approximately 3.3 billion) of all people in the world live in cities. It is estimated that this number will increase to 5 billion by 2030. As the population grows, the demands on the transport infrastructure increase. To achieve greater comfort in transport and more intelligent management and monitoring of transport infrastructure, it is necessary to ensure quality and reliable data transmission of information. This information can also be used in communication between transport infrastructure and vehicles (V2I). Effective communication in the Smart Mobility concept is a key component, on which other intelligent solutions within the Smart Mobility concept are based. Creating such a complex system of vehicle communication with all entities of the transport infrastructure is a challenging process. It is necessary to ensure the security of communication, sufficient data storage capacity and speed of processing the obtained data. The mentioned requirements are a small part of the necessary parameters that would enable the creation of a fully autonomous vehicle. To specify the requirements of V2I communication, it is necessary to acquire a realistic estimate of the amount of data produced by autonomous vehicles. The authors have many years of experience with data integration of various transport systems and also with the entire process from data collection to knowledge extraction for decision making. There is a lot of research that has focused on various aspects of Smart Mobility, such as, systems integration, the construction of transport infrastructure, transport system resilience, traffic safety, green mobility and data communication security [3; 4; 5; 6]. Another piece of research defines the methodical requirements for the operation of the Smart Mobility concept and its goals [7]. Based on our previous experience, our intention is to point out the data aspects, which need to be considered in order to maintain sustainable communication in the Smart Mobility concept. Currently, the most modern commercial vehicles on the market fall into the third level of autonomy according to the Society of Automotive Engineers (SAE International) and are awaiting regulatory approval. However, even vehicles at a lower level of autonomy generate approximately 25 GB/h of data. Each higher level directly correlates with the number of sensors in the vehicle, which causes a higher amount of data produced [8]. The usability and availability of sensors and camera modules in the vehicle changes the orientation of the automotive industry mainly into the data viewpoint. The data obtained from sensors, combined with computing, transform data to make decisions of an autonomous vehicle. According to calculations by [PERSON] in 2017 [8], whose article was updated by [PERSON], after combining the estimated amount of data from individual vehicle sensors from the third level of autonomy, the total amount of data transmitted are approximately 19 TB/h. For vehicles that fall into the lower category of autonomy, the estimated amount of data produced are about 1.4 TB/h (Figure 1). According to the American Automobile Association (AAA), the average person spends 17,600 min a year behind the wheel, which is about 293 h. After counting the calculated values, we can estimate that one vehicle produces more than 5500 TB of data per year [8]. The scope of this paper is focused on data requirements in V2I communication. We also discuss the effectiveness of existing solutions in relation to such an enormous amount of data which need to be stored, transform and processed in the Smart Mobility concept, specifically V2I communication.