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In this thesis, we present an innovative Long Term Evolution (LTE) Uplink model, for operations in the vehicular environment, and we evaluate the performance of LTE in an Intelligent Transportation System (ITS), in order to examine if LTE is a viable candidate for ITS communications, and if so, to steer further scientific research in that area. Because of the fact that the vast majority of research on a communications protocol for ITS applications, has been strictly focused on IEEE 802.11 p, some other promising options such as LTE, have not received the proper attention by the scientific community. In this thesis the suitability of LTE for ITS communications is being investigated and its capability to handle the strict ITS communication requirements is being examined. The model built in the context of this thesis, simulates the Uplink operations of LTE, in a vehicular network supporting ITS, under various network conditions and various network parameter values. The outputted results, indicate that LTE can meet the ITS requirements both in terms of latency and capacity, and in some cases even outperform the 802.11 p standard. The multiple simulations under various network conditions, give us a clear image of LTE’s behavior during network operation, and provide a useful guide for anticipating the standard’s performance when the network’s parameters change. The identification of both standards’ strong and weak points, through the comparison of their performance, allows us to draw conclusions about the potential use of each standard in an ITS concept and propose the most promising areas for further research.