Precisely the plan, Wes. The horn serves two purposes. One, it alerts the
transgressor that they pushed the button. Two, it alerts me to fire up the
truck and block the road.

As others have pointed out, a two pressure hose setup and some simple math
in a microprocessor of some sort would serve the same purpose at far less
current draw, but I'd like to try the radar gun first.

Hell, Jim Thompson went on for two weeks about how to detect a school bus
pulling up in front of the house. I thought this one would go on for at
LEAST as long {;-)

BTW, Jim, what was your ultimate solution to that problem?

Jim


Now for a "prohibited" non-technical suggestion, here is one that I am
contemplating. I too live on a short, private, single-lane road, that
serves four multi-acre homesites. I am plagued by the guys driving
delivery trucks (DHL, UPS, etc) who roar down the road in a cloud of
dust while delivering to my neighbors. I have complained to UPS
repeatedly without success.

So one of these days, when I'm up to it, after they go by on the way
to the neighbor's house, I'm going to take my truck out and block the
road for 15 minutes. (A second offense will call for a penalty of 30
minutes, etc) UPS seems to have a deal with law enforcement that
exempts them from speed limits on public roads, but in AZ the statutes
say: