I discovered some great SC4 tutorial videos after visiting YouTube today. I found a helpful video on laying NAM EL over road transit pieces
It's always nice to see step by step tutorials because sometimes we need visual aids and video tutorials show us exactly what to do. Very handy aid to written tutorials. You can find more SimCity 4 tutorials on YouTube.
Speaking of tutorials I'm thinking of putting together a tutorial myself on how to make realistic recreations in SimCity but that's a future project so you'll have to wait for that one.