I came up with a new card: Switching Tracks
Symbols: 2 cards, Train Braking, 2 cards.
Then at the end of the round you Draw another Round Card.
Yes, it may be broken and it will extend the game by 1 round but I don't see all that much moding on this game, so why not.
Another thing that I am working on is symbols to indicate:
Reverse Order but a Double card like a bridge.
Reverse Order in a tunnel.
a Double card like a bridge but reverse order.
While these may seem confusing at first they should be fun.
I saw the Lightning bolt card symbol so I figured why not.
Hmm, How about a Random symbol: Like a Die, you roll to see who goes next. first/next.
Just some random ideas today.