IoT-based multifunctional Scalable real-time Enhanced Road Side Unit for Intelligent Transportation Systems

This paper presents the design of a modular, Scalable Enhanced Road Side Unit for use as part of a comprehensive Intelligent Transportation System based on the concept of Internet of Things (IoT). The proposed unit is designed to collect information using a variety of sensors and an on-board camera. The collected information can then be uploaded to a central server for actions such as speed limit adjustment, metering routes to reduce vehicle congestion and emissions, and issuing weather advisory warnings. Communication between an individual unit and the central server are performed using existing wireless cellular networks. Each module also contains an RF module for communication with both other nearby units and other parties equipped with an appropriate receiver module. Lab testing with an initial prototype confirmed the feasibility of the proposed communication links and evaluation of the current real-time software implementation showed an average total CPU resource usage of 34%, giving room to expand functionality with additional tasks.