[cwiert]

I hear a lot of road noise in the car. normally i don't care, just turn the radio up, but where there's a passenger in the car, the road noise annoys me because it's too loud. I'm assuming 20+ years of insulation deterioration is the culprit. But what can be done?
I've been thinking about spraying in foam insulation behind the rear wheel wells. I'm just curious if anyone else has tackled this issue.