I'm SO excited to hear that you're interested in making rolling tables - first of all, because it's a great opportunity for a pun, of course. But the reason I include rolling tables in the list of things that are welcome for this jam is because I love them! And I think they're such a great resource for folks to use in their tabletop gameplay. I don't know if I'm going to have time for two entries this year but if I do, I might do some rolling tables myself. (My current plan is a short system agnostic adventure module!)
In addition to your excellent passenger, luggage, event table things - here are some things that I think could be really fun rolling table lists, whether you want to make them yourself or someone else wants to run with them!
- Train cars themselves, especially on a fright train or a train with a variety of cars.
- Train station names and/or short descriptions
- Conductors and station managers and other train staff
Another resource that could be really fun is something that includes timetables and schedules. I'm not necessarily positive it needs to be formatted AS a rolling table, and I'm not sure I completely understand my own vision here, but I'm throwing it out there in case it sparks inspiration for someone.