| Clue | Source | Date |
|---|---|---|
| Train units with bars | Eugene Sheffer | 11 Aug 2023 |
| Places for drinks on tracks | The Washington Post | 11 Aug 2019 |
| Places for drinks on tracks | LA Times Daily | 11 Aug 2019 |
| Places for drinks on tracks | ||
| Where riders lounge | Eugene Sheffer | 24 Sep 2015 |
| Some trains have them | ||
| Pullman units | ||
| Commuters' luxuries. |