Chris is correct, by comparison with Europe the US has virtually no surface public transport bar in the largest urban centres. Americans either hire a car (unless they start from home, in which case they will possibly have a choice of more than one) or fly (unless it is short enough for a taxi). This is why the US is difficult for strangers to move around (except by hiring a car) and it is the world's highest polluter per capita by far. Just last week, when explaining to a visiting American the London congestion charge and stating by comparison the dominance of the car in the US, I was instantly and angrily accused of hating Americans. Mind you, I referred to the car as being (a) god - big mistake with a foaming-at-the-mouth religious zealot. Tread carefully when there because alarmingly many of them are very insecure and see everyone as a potential (perhaps mortal) enemy. I did not know Portland had the reputation you mention, but I venture that simply means it is a tinder box with the conservative right about to trey to wipe the unamerican opposition out.