Originally Posted by
Tightwad
Could be. God gave the lucky amoung us 5 senses why would anyone deliberately shut off one
in moving traffic.
Dumb. Very Dumb.

High-functioning autistics could very well be safer without the sounds of traffic, allowing them to focus on what they see. Or some types of post-traumatic stress disorder. But then I'm no expert.
Other than that, hearing == safer.