New York City: 3
Aggressive but generally under control. Decent infrastructure to keep things in check. 'No right on red' law, I never truly appreciated you!
West Palm Beach: 3
Not so bad, really, except there seem to be a lot of teens around with nothing to lose. If there's an accident, the Jaws of Life will probably be involved in the cleanup.
Providence: 2
Friendly and meandering, but also frequently dim-witted. Scary highways.
Hong Kong: 3
Other than the terrifying double-decker buses, very well-behaved. Walk means walk!
Guangzhou : 7
Frequently scary. 10 second Walk signs across 10 lane roads. Many major crossings without stop/walk signs. Disregard of crosswalks by cars. Some bike chaos.
Thailand : 8
Taxi drivers enacting speedway fantasies, but it all seems fun! Must be the hot pink cabs.
Beijing : 10! 
My life has flashed before my eyes each time I neared a major road. Few seat belts in taxis. People leaping over railings into traffic, drivers accelerating towards hobbling old women... The WALK sign here means 'go ahead and walk if nobody is speeding through on a right or left turn.' Seriously: the lanes never stop completely! It's terrifying! I could go on and on. The level of risk everyone seems willing to take is quite stunning.
On the other hand, the city deserves props for incredible bike lanes on every street, as well as nice long, green, bench-lined parks for shade and outdoor exercise equipment. I can't imagine what they'd do without the bike lanes (which is why they're probably there – their cost-benefit analysts couldn't imagine, either). And I really can't imagine what the streets will be like, come August. Where will all those people fit?
