| Answer | Crossword Clue |
|---|---|
| SYST | Rail complex: Abbr. |
| SYST | Complex: Abbr. |
| APTS | Complex units (abbr.) |
| APTS | Complex units: Abbr. |
| STE | Abbr. on a letter to an office complex |
| STA | Rail stop: Abbr. |
| SYSTS | Rail networks: Abbr. |
| TRMS | Rail centers: Abbr. |
| RTO | Rail overseer: Abbr. |
| TRM | Rail station: Abbr. |
| STN | VIA Rail stop (abbr.) |
| RRB | Rail pension unit: Abbr. |
| SDG | Secondary rail track: Abbr. |
| CTA | Windy City rail system: Abbr. |
