1. How important is it to make sure you alternate symbols? (Beyond the obvious of not having 3 in a row). Do you go out of your way to avoid two in a row?
2. Is it better to put major junctions at the most common circle/triangle symbols, or on squares, or the rarer ones?
3. How much imortance do you place on the slowdown from lines crossing not at stations? I always go out of my way to avoid doing it but I wonder if I overrate the importance of it in my mind.
4. When you notice that some random station along a single line is getting a lot more traffic than other ones, do you shift other lines to cross it or just add more carriages?
One of the most frustrating (but addicting) things with the game is that a couple of my highest scores happened when I first started playing it, before I thought I knew any tricks at all! Wish I could see what the best players' maps end up looking like.
Oh yeah, one more question... do you play the secret level? What actually happens there, or is it just a gag?