Drachten: A plan for Portland?

I was watching Beyond Tomorrow, and they had a spot on Naked Streets. The basic idea is simple - get road of street signs and markings. The host even commented that there was almost no distinction between roadways and walkways. In Drachten, they replaced a standard 4-way intersection (stop lights, crosswalks, etc) with a roundabout and no signage. Only rule is that pedestrians get priority. They have a fountain that gets higher as traffic increases, thus drowning out the sound. I think the real key is that they were talking about how many accidents they had with the old system - and NO accidents in the last 4 years since they changed systems. I could definitely see something like that going over well in Portland (or Ashland).