6G for intelligent transportation systems: standards, technologies, and challenges

The advent of the sixth-generation (6G) wireless communication technology brings forth immense opportunities for enhancing Intelligent Transportation Systems (ITS). We investigate the potential of 6G in revolutionizing transportation systems by analyzing the standards, technologies, and challenges associated with its implementation. Building upon the advancements of 5G, 6G introduces unprecedented capabilities, including ultra-high data rates, ultra-low latency, massive connectivity, and intelligent network orchestration. Leveraging these capabilities, 6G can facilitate seamless connectivity among vehicles, infrastructure, and pedestrians, enabling novel applications such as autonomous driving, smart traffic management, and cooperative collision avoidance. However, realizing the full potential of 6G for ITS entails addressing several challenges, including spectrum allocation, network security, resource management, and interoperability with existing infrastructures. We present a comprehensive overview of the latest developments in 6G standards and technologies, including mmWave communications, terahertz spectrum, visible light communication, Artificial Intelligence, and edge computing, emphasizing their relevance to ITS. We also describe these technologies in the context of ITS. Furthermore, we explore the potential benefits and impacts of 6G on transportation systems, highlighting the opportunities for improved safety, efficiency, and sustainability. Finally, we conclude by discussing the key challenges and research directions that must be addressed to effectively deploy 6G for ITS, thereby paving the way for the next generation of intelligent and connected transportation systems.