Proximity to freeways increases autism risk, study finds [0]. Having a mother who lived within 1,000 feet of a freeway while pregnant doubles a child's odds of having autism [1]. Basically, white noise can cause autism. People are screwing up their kids at an exponential rate [2]. [0]: https://web.archive.org/web/20210609042055/https://www.latim... [1]: https://www.webmd.com/brain/autism/news/20101217/fast-lane-t...…
I was a strange child that could only sleep if mother turned on a hair dryer next to me some nights. This is materially different from highways - I briefly got to experience what it was like living next to a noisy road and I would argue it would be more likely that it is the role of noisy cars, screeching tires, horns, and pollution that is at play in these studies, not the white noise of highways. Would children that lived in windy forests with no sound isolation having to listen to the noise of the trees fare the same?
Most autistic people are sensitive to stimuli - sensitivity being nearly completely genetic determined and little to do with environment. I wonder if it this greater sensitivity being triggered by highways and disturbs sleep that impairs brain development.