| Clue | Source | Date |
|---|---|---|
| Track syst., as Calgary's CTrain | ||
| Light rail transit; abbr. (3) | ||
| Transit sys. | ||
| Lettered transportation in Edmonton | ||
| Urban transit ( Acronym ) | Canadiana | 21 Jan 2019 |
| Urban transit org | Canadiana | 01 Jan 2018 |
| Calgary transit sys | Canadiana | 04 Jan 2016 |
| Urban transit sys | Canadiana | 26 Oct 2015 |
| Els, sometimes |