Take a look at these maps of where Cars and Bicycles collide from the Portland Oregonian and the Seattle PI (warning: 500k+ download). Interesting data in both cases, but check out the big brains on the Oregonian! Explorable Google maps, an ODOT analysis of fault (50% motorists, 42% cyclists, 8% shared), and reasonable advice to motorists and cyclists about how to NOT appear on the next version of the map.
Best though is the video of Jeff Mapes talking about Amsterdam, Portland and road travel safety.