Does anyone have any advice on traveling from Trieste to Venice by train. I have been on the Italia Rail site, and I've also heard about how some tickets do not include a reservation, which is often needed. What is the difference, and how do I know if I need one or not? I can go onto the website and purchase my ticket now (even though I don't need it for another 5 weeks), but do I need a reservation, as well, and how/when do I go about that.