I hear traffic is awful most places (Italy, India, Peru (Experience: Do not drive in Peru). It seems like America and Western Europen are the few places where traffic isn't "deadly".
So its probably not going to be an issue for you unless you're on a scooter. If you check around the forum, most seem of the opinion that riding a scooter is unnecessarily dangerous in the cities.
Did you know that teaching English positions usually open up early August? Therefore by early September you'll be missing the peak opportunity time. Try to get to Taiwan before late August.
I'm not in Taiwan yet, but here is what I've learned so far in my preparation for the move.
Also depends on where you're coming from. For example, I'm from NY and I think the hardest part for me will be the fact that decent, real milk is near impossible to come by. And also that its cheaper to eat out than in. I need my cereal/eggs, bacon, toast, and whole milk+coffee in the morning damnit.