I’m still on recess from anything important, so here’s my next trivial wondering: What is it with these massive highway “sound barriers” that deface our landscape? I’m talking about beauties like this one, that cost $1,000,000 per mile to build. We taxpayers have now spent some $6,000,000,000 (that’s pronounced “six billion dollars”) on them, and I’m wondering why. Like, why are they really there? And at what cost? And for what benefit? If you look closely at the pavement