An Intelligent Real Time Road Sign System

This paper presents an intelligent road sign that provides real time travel time and road conditions. The behavior of US Interstate 94 was modelled, where the typical road throughput was simulated and published to an MQTT broker for the embedded system to display the expected travel time to Ann Arbor, Michigan from the US23 junction. The embedded system additionally sampled a digital temperature and humidity sensor to note road conditions, where an external input allowed operators to provide a real time update when an unexpected event causes traffic (i.e. vehicle collision) or when the road has been cleared. System requirements, design, implementation details, and performance evaluation are included.