Earlier quoted context omitted.
Why do you think white noise causes autism?
Basically, humans are pattern seeking creatures, and children exposed to white noise will try to find patterns in white noise, when there are none, thus leading to the brain maladapting to random patterns. My theory, but I couldn't find a good definition of traffic noise being related to white noise or classified in particular, but who knows.
This lead to me having a recurring nightmare which I also got for a long time into adulthood, seeing the tone as 1/2D line, flowing along nicely, and then the static would screw it up and turn it to knots and I would be unsuccessful in making it turn back to a line.