| Source Element | Destination Element | Flow |
|---|
| City of St Louis Traffic Operations Center | East–West Gateway COG Archive Data System | traffic archive data |
|---|
| Franklin County Local Jurisdictional Traffic Engineering Department | East–West Gateway COG Archive Data System | traffic archive data |
|---|
| Illinois DOT Traffic Operations Center | East–West Gateway COG Archive Data System | traffic archive data |
|---|
| Missouri DOT Gateway Guide TMC | traffic archive data |
| Missouri DOT – Tunnel Control Center (Lindbergh Blvd) | East–West Gateway COG Archive Data System | traffic archive data |
|---|
| Missouri DOT Gateway Guide TMC | traffic archive data |
| Missouri DOT Gateway Guide TMC | East–West Gateway COG Archive Data System | traffic archive data |
|---|
| St Charles City Transit Center | East–West Gateway COG Archive Data System | traffic archive data |
|---|
| St Charles County Gateway Green Light System | East–West Gateway COG Archive Data System | traffic archive data |
|---|
| Missouri DOT Gateway Guide TMC | traffic archive data |
| St Charles County Traffic Operations Center | East–West Gateway COG Archive Data System | traffic archive data |
|---|
| Missouri DOT Gateway Guide TMC | traffic archive data |
| St Louis County Traffic Operations Center | East–West Gateway COG Archive Data System | traffic archive data |
|---|
| Missouri DOT Gateway Guide TMC | traffic archive data |