Legally Blind Man Tests Google's Self-Driving CarBy Norman Chan In this Google promotional video for its self-driving car project, Steve Mahan, a Santa Clara man who is 95% blind, becomes the first public test driver for the autonomous Prius. Mahan rode the car along a pre-planned route, but it was able to navigate intersections and observe traffic rules during transit. The video was produced in partnership with the local Police Department to ensure safety, and offers a clear glimpse into some of the equipment used to make the project work.