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Figure 33. Diagram. CAVERS data flow diagram.

This diagram illustrates the data flow of the Connected and Automated Vehicle Education Research Software (CAVERS). The diagram begins with a vehicle that is equipped with an onboard unit (OBU). A double-sided arrow points to the OBU and a roadside unit (RSU). The arrow is labeled Society of Automotive Engineers (SAE) J2735. Basic safety messages (BSMs) are being sent from the OBU to the RSU and signal phase and timing (SPaT), MAP, and traveler information messages (TIMs) are sent from the RSU to the OBU.

An arrow points from the RSU to a packet sniffer running on the RSU, which is labeled with the number 2. The RSU forwards BSMs to the sniffer. Vehicle-to-Everything (V2X) Hub and the RSU exchange messages, as indicated by a double-sided arrow. The sniffer transmits messages to the stream parser, indicated by an arrow labeled with the number 3. The stream parser transmits messages to Kafka, indicated by an arrow labeled with the number 4. Kafka publishes messages to the database, indicated by an arrow labeled with the number 5. The CAVERS Web page and the web service exchange messages, indicated by a double-sided arrow labeled with the number 6. The database then sends messages from Kafka to a web service, indicated by an arrow labeled with the number 7. Kafka then publishes messages to the web service, indicated by an arrow labeled with the number 8. Data is exchanged between SQL Queries and the Database, indicated by a double-sided arrow labeled with the number 9. A note at the bottom of the figure states, “7 and 8 may be swapped depending on whether archived data or a real-time stream is being plotted.”

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