I grew up on a highway but so did my 6 siblings and so far I'm the only one with PD. Two of my siblings lived on the highway during adulthood also and they are 9 and 10 years older then I am.

I read an article once that said not even the most remote island is pollution free now. You might be able to find a spot that has less pollution but can't escape completely. We are all in this together I'm afraid.