I'm stealing this from Gabe's blog, TransitMiami.  It's too good.  Maybe you've seen it before, but I hadn't.

Reminds me of Sheller & Urry's "The City and the Car"¹:

Automobility is a complex amalgam of interlocking machines, social practices and ways of dwelling, not in a stationary home, but in a mobile, semi-privatized and hugely dangerous capsule. [...] As people dwell in and socially interact through their cars, they become hyphenated car-drivers: at home in movement, transcending distance to complete series of activities within fragmented moments of time. The car is thus not simply an extension of each individual; automobility is not simply an act of consumption since it reconfigures the modes of especially urban sociality. [...] Most importantly, there is an implicit underlying threat that is barely addressed by theorists of civil society: that the very freedom of mobility necessary to publicity somehow also holds the potential to disrupt public space, to interfere with the more stable associational life and to undermine proper politics. Mobility is the enemy of civility.

_{1. Sheller & Urry, 2000.  International Journal of Urban and Regional Research Vol. 24.4: 737-757.}