Hi Rachael (Fe203Girl),
Yes, the public transportation system is very good. It stretches from as far east as Gresham, and as far west as Hillsboro, and they were talking of extending north and south rail lines. It is inexpensive and convenient to use, well maintained, and clean (no grafetti). The company I worked for when I was there built the Portland transit system called Max.
Odrade is correct about the signs and bumper stickers. There was a large famous billboard sign on Interstate 5, going north into Oregon from California, that stated, "Don't Californiacate Oregon." By the mid-1990s, the anti-California feelings subsided as Californians took over the majorty of the population around the Portland area.
In America, California is to the United States as the United States is to the rest of the world. California is loved and hated at the same time and for the same reasons. Oregonians especially have a real love-hate relationship with Californians.
Jim Whitney