| Source Element | Destination Element | Flow |
|---|
| Arterial Roadside Equipment | Arterial Traffic Control Systems | roadway information system status |
| Arterial Traffic Control Systems | Arterial Roadside Equipment | roadway information system data |
| Caltrans Regional TMCs | Caltrans TMC Roadside Equipment | roadway information system data |
| Caltrans TMC Roadside Equipment | Caltrans Regional TMCs | roadway information system status |
| Port ATMIS | Port DMS | roadway information system data |
| Port DMS | Port ATMIS | roadway information system status |
| Port Operation Centers | Port Roadside Equipment | roadway information system data |
| Port Roadside Equipment | Port Operation Centers | roadway information system status |