You'd be surprised what good insulation and double-pane windows can do. My family lived with a major freeway right next to our backyard (literally...backyard, brick wall, freeway) and when the windows were closed, you couldn't hear anything.
Made hanging out in the backyard kinda impossible and unsoothing, though.

But I figure that no burglars would be jumping into our backyard.
One thing for sure, if the freeway was right next to my current place, it would be terrible. Even with all of the windows closed, if our neighbor sneezes outside his door, I can hear it.