What we have is the city's reaction to law suits, accidents, activists, and challenges from dense cities in the Pacific Northwest.
Look around. Most of these newly painted bike lanes are little more than adjusted curb space. Lanes for cabs and angry commuters to abuse. Time will tell if our substantial mileage lives up to the hype.
It's true, Philadelphia doesn't have a lot of room to spare. Even compared to Manhattan, our streets are narrow and our sidewalks are narrower.
And while many bike lanes in Seattle and Portland bear a striking resemblance to the white lines being laid down all over Center City, we have something they don't: a generally pissed-off-at-the-world population willing to mow down hipsters first, deal with the consequences later.