| Source Element | Destination Element | Flow |
|---|
| Lacey ITS Roadway Equipment | Lacey Traffic Management System | right-of-way request notification |
| Lacey Traffic Management System | Lacey ITS Roadway Equipment | signal control commands |
| Lacey ITS Roadway Equipment | signal control device configuration |
| Lacey ITS Roadway Equipment | signal control plans |
| Lacey ITS Roadway Equipment | signal system configuration |
| TCOMM 911 | emergency traffic control information |
| Thurston County ITS Roadway Equipment | signal control commands |
| Thurston County ITS Roadway Equipment | signal control device configuration |
| Thurston County ITS Roadway Equipment | signal control plans |
| Thurston County ITS Roadway Equipment | signal system configuration |
| Local Emergency Vehicles | Lacey ITS Roadway Equipment | local signal preemption request |
| Olympia ITS Roadway Equipment | local signal preemption request |
| Tumwater ITS Roadway Equipment | local signal preemption request |
| WSDOT ITS Roadway Equipment | local signal preemption request |
| Olympia ITS Roadway Equipment | Olympia Traffic Management System | right-of-way request notification |
| Olympia Traffic Management System | Olympia ITS Roadway Equipment | signal control commands |
| Olympia ITS Roadway Equipment | signal control device configuration |
| Olympia ITS Roadway Equipment | signal control plans |
| Olympia ITS Roadway Equipment | signal system configuration |
| TCOMM 911 | emergency traffic control information |
| Thurston County ITS Roadway Equipment | signal control commands |
| Thurston County ITS Roadway Equipment | signal control device configuration |
| Thurston County ITS Roadway Equipment | signal control plans |
| Thurston County ITS Roadway Equipment | signal system configuration |
| TCOMM 911 | Lacey Traffic Management System | emergency traffic control request |
| Olympia Traffic Management System | emergency traffic control request |
| Tumwater Traffic Management System | emergency traffic control request |
| WSDOT Olympic Region Signal Shop | emergency traffic control request |
| Thurston County ITS Roadway Equipment | Lacey Traffic Management System | right-of-way request notification |
| Olympia Traffic Management System | right-of-way request notification |
| Transit Vehicle OBE | Lacey ITS Roadway Equipment | local signal priority request |
| Olympia ITS Roadway Equipment | local signal priority request |
| Tumwater ITS Roadway Equipment | local signal priority request |
| WSDOT ITS Roadway Equipment | local signal priority request |
| Tumwater ITS Roadway Equipment | Tumwater Traffic Management System | right-of-way request notification |
| Tumwater Traffic Management System | TCOMM 911 | emergency traffic control information |
| Tumwater ITS Roadway Equipment | signal control commands |
| Tumwater ITS Roadway Equipment | signal control device configuration |
| Tumwater ITS Roadway Equipment | signal control plans |
| Tumwater ITS Roadway Equipment | signal system configuration |
| WSDOT ITS Roadway Equipment | WSDOT Olympic Region Signal Shop | right-of-way request notification |
| WSDOT Olympic Region Signal Shop | TCOMM 911 | emergency traffic control information |
| WSDOT ITS Roadway Equipment | signal control commands |
| WSDOT ITS Roadway Equipment | signal control device configuration |
| WSDOT ITS Roadway Equipment | signal control plans |
| WSDOT ITS Roadway Equipment | signal system configuration |