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Top1. Introduction
Nowadays, one of the major consequences of the important evolution in the field of telecommunications is the development of the transport systems. This is due primarily to current needs in terms of availability and access to data at any time and from any place. Indeed, it aims to make networks safer, more efficient, more reliable and more environmentally friendly without necessarily having to physically alter existing infrastructure.
These new technologies in question include computer science and sensor technologies, control and communications systems; it touches disciplines such as transport, engineering, telecommunications, information technology, finance, e-commerce, automotive engineering, etc.
Intelligent Transportation Systems (ITS) contributes to all major transport policy objectives. Through the application of ITS, road networks can be operated and utilized more efficiently (International Road Federation [IRF], 2016). ITS plays an important role in both preventing accidents and mitigating their impacts (IRF, 2016); they also help to reduce the travel time and the congestions. Likewise, ITS aim to provide innovative services relating to different modes of transport and traffic management (Intelligent transportation system, 2016). As with road safety, ITS contributes to improve user comfort by providing him a variety of information services, of decision support, guidance, monitoring and surveillance of internet access and make safer, more coordinated, and 'smarter' use of transport networks.
The result of ITS technology is a more efficient and reliable road transport network that operates with a minimized effect on the environment (IRF, 2016). Indeed, many applications have since emerged. One of these applications concerns road safety which consists of reinforcing this latter and to equip our cars and roads with capacities to reduce the number of accidents and make roads safer and more convivial. Much information is generated through these systems, such as traffic information, information about accidents or dangers and obstacles, weather information, etc.
As a result, many systems emerged such as the VSN (Vehicular-based Sensor Network) and VCs (Vehicular Clouds), through various forms of communication, mainly VANet.