[mlyle]

Transitioning to bike-centric urban transit takes decades. The best cities in the world have roughly equal bike and car traffic (and a big chunk of transit), but it's taken decades to get there.

Cars moving over the next 15 years to be much safer for pedestrians/cyclists could be a big shortcut on this path.

[jkelleyrtp]

Seemingly Paris has done a great job over the past 2-3 years.

[mlyle]

Paris has done great in climbing up to a bit more than 15% of daily trips by bike.

My point is: even the bicycle capitals of the world (Amsterdam, etc) have equal car and bike trips per day, and it's taken a long time to get there.

[galeso]

IMHO, San Francisco's Telegraph Hill neighborhood with it's 31.5% grade will take longer than Paris to become bike friendly.