| Source Element | Destination Element | Flow |
|---|---|---|
| City of El Paso Field Equipment | Rail Operators Wayside Equipment | rail crossing operational status |
| Rail Operators Wayside Equipment | City of El Paso Field Equipment | track status |
| TxDOT El Paso District Traffic Signals | track status | |
| TxDOT El Paso District Traffic Signals | Rail Operators Wayside Equipment | rail crossing operational status |