Overview
This report describes the system architecture and design of the Experimental Prototype System (EPS) for the demonstration of the use of mobile devices in a connected vehicle environment. Specifically, it defines the system structure and behavior, the software components, the interfaces and the data necessary for fulfilling the EPS software requirements identified in Task 3: System Requirements Specifications (SyRS). This design document serves as the basis for development of the experiment prototype system that will be used to demonstrate both safety and mobility benefits of using mobile devices including how the interactions and messaging of these devices may be coordinated in order to provide more efficient (and less congested exchange of information) and how these devices might behave in an environment where mobile device coordination does not exist. The final version of this report updates the system architecture and design based on the lessons learned from the proof-of-concept test as well as functional differences for a transit vehicle versus a taxi mode of operation for the field test conducted at the Ohio State University and Battelle facilities starting June 12, 2017 and concluding June 20, 2017.