Living in the countryside won't save you. I spent my childhood in a rural area and our house had the misfortune of being situated on a steep hill, so at all hours of the day and night you'd have cars and motorcycles and tractor trailers revving their engine to get up that hill. Every year we'd have to powerwash that road-facing side of the house to clean off the accumulated black grime, and sleeping with my window open, which faced that same road, always caused me to wake up raspy and hacking. Cars are a problem no matter where you live.