Abstract— Everyone knows the important role of transport in the economic and social development, at the level global this sector is considered among the principal criteria for country rankings. But control and management of traffic in urban areas remains a major challenge to rise, especially accuses rapid development of the transport sector. On the other hand, many alternative solutions have been proposed within the intelligent transportation systems (ITS) to optimize traffic safely. To address this problem, among them Vehicular Ad-hoc NETwork (VANET), that will implement new innovative applications and services. In this paper, we propose an approach using ontologies and VANET to enable more efficient and optimal use of road infrastructure. Keywords—Ontology, Traffic Management, Vehicular Ad-hoc Networks, Safety. I. INTRODUCTION o one can ignore today the crucial role of transport in developing countries, whether it's on the economic or social plane. At the global level this sector is considered among the principal criteria of development, also this sector is growing rapidly and continuously. However, the transport sector is currently confronted with significant challenges, particularly in urban areas. These transport problems reduce the economic development opportunities, and quality of life of citizens who are affected psychologically and physically. Among these problems that may be mentioned traffic congestion, increased energy consumption, waste of time, limited mobility and degradation of air quality. Moreover, transport accidents are the most serious problems because of their socio-economic damages, including property damage and human losses. To remedy this problem, intelligent transportation systems (ITS) become an alternative to optimize traffic safely. ITS have emerged as an effective way to improve circulation, it will help to use less energy in the travel, less distance to reach the desired position with a time and money, Hamza TOULNI is with LIAD Laboratory. Faculty of Sciences Ain Chock Casablanca, University Hassan II, Morocco. (E-mail: hamza.toulni07@etude.univcasa.ma). Benayad NSIRI is with LIAD Laboratory. Faculty of Sciences Ain Chock Casablanca, University Hassan II, Morocco. (E-mail: b.nsiri@fsac.ac.ma). Mohammed BOULMALF is with International University of Rabat, Sala El Jadida, Morocco. (E-mail: mohammed.boulmalf@uir.ac.ma). Tayeb SADIKI is with International University of Rabat, Sala El Jadida, Morocco. (E-mail: tayeb.sadiki@uir.ac.ma). while respecting nature. And one of the effective ways possible to have these benefits at lower cost, are Vehicular Ad- hoc NETwork (VANET) [1]. VANET are based on mobile ad hoc networks (MANET), where each vehicle is equipped with wireless communication devices, which are designed to ensure communication between vehicles and the road infrastructure, and therefore play a crucial role in providing innovative applications and services [1, 2, 3] in the road transport sector. These applications and services are designed not only to improve road safety but also for comfort, support and entertainment. VANETs uses specialized short-range protocol communications (DSRC) [4, 5] to broadcast messages at high speed in several directions [6, 7] because its latency is low, but the coverage of this solution is very limited. To overcome this problem, researchers proposed V2V communication [8, 9], so that vehicles can further communicate with Road Side Unit (RSU), and VANETs does not require a significant investment for implementation. In addition to high-speed connectivity at lower cost, vehicles equipped with VANET devices can take advantage of multiple location technologies with high accuracy [10], either with a relative location [12,11, 13] or even a global location [14, 15,16]. In this paper, we propose an approach using ontologies and VANET to enable more efficient and optimal use of road infrastructure. The rest of this article is organized as follows. First, we give a literature review of traffic management systems. Second, we give an overview of the ontologies we show the main solutions based ontologies. In section 3 we present our approach. Finally, the conclusions and future research are shown in section 4. II. LITERATURE REVIEW In recent years, several articles have been published about the management of urban traffic, these articles fall into two broad categories: Estimated circulation and the optimization of traffic. The traffic estimate is mainly based on analytical modeling of data collected by sensors installed all along the roads, or even vehicles. The information collected in real time are also used in the optimization of traffic, but the techniques and methods change. For example, the works presented in [17,18] the road is Urban Traffic Management Approach Based on Ontology and VANETs H. TOULNI, B. NSIRI, M. BOULMALF and T. SADIKI N New Developments in Circuits, Systems, Signal Processing, Communications and Computers ISBN: 978-1-61804-285-9 145