Help: my neighbor is killing my music....

I have a truck driver neighbor that has a tendency to leave his diesel truck idling for hours and hours and hours. One time it idled for nearly 20 hours, no kidding. He parks his rig across the street from where I live and sometimes the low frequencies are in-escapable in my home. Forget about listening to music. On ocassion, depending on where exactly he parks, my bedroom sounds like a running refrigerator.

An idling engine is illegal in a residential area in the state of California. I know, I checked. I have called the police several times and they have shown up several times. The idling stops and then starts up again. Whatever fine he is getting from the police does not seem to bother my neighbor very much. Either he pays it or ignores it. Whatever he gets fined must be worth leaving his engine idle for hours.

I am posting this note now as my neighbor's truck won't let me get to sleep. I am at my wit's end. Calling the police doesn't do any good as the idling is still goes on. I don't want to comfront this guy face to face and start some kind of hassle. I just want him to park his rig in a truck stop where it is supposed to be parked.

I need my sleep.

I want to be able to hear my music, again.

Any ideas?