cronatucf

I've been playing Simcity 4 for a couple weeks now and still can't figure out how to make the trains work ( el train and passenger). I can't seem to get people to travel from city to city in my region on the trains. If I don't connect roads between cities then the people won't travel at all. Even when I put the el train or passenger train in a single city the people only use it to park and walk to their work/home. Thanks!!