Fiber-optic sensor (FOS) technologies, given their high sensitivity, immunity to electromagnetic interference, and suitability for harsh environments, have emerged as promising tools for enabling intelligent transportation infrastructure. This review critically examines the current landscape of. If 5G is the neural conduction of the digital age and AI the super brain, fiber sensing serves as the quietly growing peripheral nerves. In 2023, a group from California Institute of Technology, collaborating with Google, achieved the world's first commercial submarine cable-based second-level. Xin Gui and Jiaqi Wang are with Hubei Longzhong Laboratory, Wuhan University of Technology Xiangyang Demonstration Zone, Xiangyang 441000, China; National Engineering Research Center of Fiber Optic Sensing Technology and Networks, Wuhan University of Technology, Wuhan 430070, China (email:. In the rapidly evolving landscape of transportation, sensor networks and Internet of Things (IoT) technologies are playing a transformative role. These innovative solutions are reshaping the way we move people and goods, ushering in a new era of intelligent transportation systems (ITS) that promise. Fiber optic technology is revolutionizing the transportation industry by enabling faster, more reliable communication, enhancing safety, and improving operational efficiency. The transportation industry — encompassing highways, railroads, and subways — is undergoing a significant evolution as it. Distributed Acoustic Sensing converts a standard single mode telecoms fibre optic cable into an array of distributed sensors to deliver spatially and temporally rich traffic management information. Using new or existing fibre optic infrastructure as an intelligent traffic sensor allows faster, less.