|This is an
expanded view to show more detail of the information flows.
Processing Center interacts with legacy ITS Roadway Equipment. Those legacy
flows are specified at a low level because they already exist. We can tell
they are legacy because the lines are solid. They are black in color,
indicating they are unsecured by any digital certificate mechanism.
ITS Roadway Equipment provides signal phase and timing data to Southeast
Michigan Roadside Equipment. This flow is unsecured but a new thing, part of
the testbed (dashed line).
Michigan Local Current Situation Data Warehouse has a new flow to the
Situation Data Processing Center. This flow is encrypted and initiated by the