If they are worried about the cars not making any noise, why not just put a boat horn on the car so everything time the car nears an intersection, the visually impaired hear it coming. Problem solved!
In all seriousness though, I find this article absolutly ridiculous and completly agree with Tool_minion, seems like every major group out there is just in it for themselves!! Whats next, stop signs are to small for the near sighted? Give me a break...