Vision requirements for driving in New York State (from the Department of Motor Vehicles):
NY State vision requirements for driving
The National Federation of the Blind's (NFB) "Blind Driver Challenge":
NFB Blind Driver Challenge
DARPA Urban Challenge (2007):
Urban Challenge
Google's self-driving car (New York Times article from October, 2010):
Google car
CNET review of some voice activated GPS units:
review of voice-activated GPS
Article on GPS for the visually impaired from Wikipedia:
GPS for the visually impaired