| Source Element | Destination Element | Flow |
|---|
| Arterial Roadside Equipment | Railroad Roadside Equipment | hri operational status |
| Railroad Roadside Equipment | intersection blockage notification |
| SCRRA Wayside Signal System | hri operational status |
| SCRRA Wayside Signal System | intersection blockage notification |
| Caltrans TMC Roadside Equipment | Railroad Roadside Equipment | hri operational status |
| Railroad Roadside Equipment | intersection blockage notification |
| Railroad Roadside Equipment | Arterial Roadside Equipment | arriving train information |
| Arterial Roadside Equipment | track status |
| Caltrans TMC Roadside Equipment | arriving train information |
| Caltrans TMC Roadside Equipment | track status |
| SCRRA Wayside Signal System | Arterial Roadside Equipment | arriving train information |
| Arterial Roadside Equipment | track status |