I live near a four lane road which is quite busy. I'm only about 50m away but there are two blocks of houses between me and lots of trees. The road speed is 60k

I live near a four lane road which is quite busy. I'm only about 50m away but there are two blocks of houses between me and lots of trees. The road speed is 60km/h but most vehicles travel 80km/h. I wonder if speed has some effect of whipping up the pollutants more? The road is near the main hospital. My town is not a very big maybe 70,000 total spread out over a large area. But ambulances go by once or twice per hour more frequently in the summer. The noise from them bother me more than fumes although I can't smell fumes or see nano-scale sized particulates. So if I start to act crazy...well, crazier, here in the comments you'll all know why. And before I do.