| Answer | Crossword Clue |
|---|---|
| tubelike | railroad or vehicular tunnel |
| tubes | railroad or vehicular tunnel |
| tube | railroad or vehicular tunnel |
| underpasses | A road or pedestrian tunnel passing under another road or a railroad |
| underpass | A road or pedestrian tunnel passing under another road or a railroad |
| chunnel | railroad tunnel under the English Channel between Great Britain and France, approved for construction in 1986 |
| chunnels | railroad tunnel under the English Channel between Great Britain and France, approved for construction in 1986 |
