Based on the "research" presented on 20/20, it sounds like the best approach would be to

1) develop a helmet that looks like a simple beanie or bucket hat
2) dress in old dark clothing
3) put a cigarette in you mouth
4) weave the bike like you're drunk

By increasing your "ambiguity", and decreasing your predictability and apparent level of skill, drivers will automatically give you more room!

BTW - chipcom, how are these techniques working for you?