To get more than 5 people in on a game without having teams I was thinking about buying another set of train cars (or two or three), painting them a unique color, and then doing one of a few things...
- Make every single path/line a double and make every double path/line a triple.
- Make every single path/line a double and keep every double
path/line a double.
- Introduce a new mechanic that expands on suggestion 1 that involves paying an extra Locomotive (Wild) card.
This might be a little too cutthroat, but if blocking people by claiming paths/lines are part of your strategy this could be fun. If you want to claim/block a single path/line (which would now be doubles) you have to pay one extra Locomotive (Wild) for paths/lines that are 1-3 spots and two extra Locomotives for paths/lines that are 4-6 spots. Double paths/lines (which would now be triples) cannot be claimed/blocked.
Claimed paths/lines can we shown by laying one of the train pieces on its side or other any other clever way. Coins, pieces of scrap paper, etc. If you want to get crazy you can buy a set of train cars just for this purpose, paint them Silver or Gold, and use them as the first or last piece on that path/line.
I would also change the rule to trigger the last round on either 1 or 0 pieces or the first person who literally can't put down any more pieces. Something of that nature.