> Thios does NOT apply when it comes to horses.  Even a volkswagen is bigger by
> weight than a horse...although some people feel they have the right of way no
> matter what.
The law of mass tonnage always applies, that is why I called it a 
universal law.  It is a natural law rather than a man-made one, and we 
would do well to heed it (whether we are legally required to or not), 
just to be safe.
My personal policy is to not take horses out on the road until they are 
capable of handling it (no matter how inconsiderate the drivers 
are)...but then, I have a driveway that is a frontage road to a major 
freeway, so I have perfect training ground for getting the horses used to 
traffic, truckers with air horns, etc.  After hundreds of cars and trucks 
whizzing by at 60-75 mph in a matter of seconds, there is little more 
that bothers them.
It comes back to the same old thing...when you take your horse out among 
strangers, do not expect these same strangers to accommodate you and your 
half-trained horse.  And when it comes to riding on the road...you are 
invading on the territory of motor vehicles, be considerate of them.
Horses that are taken out on the road should be able to handle honking 
horns.  If, unlike me, you do not have a freeway in your front yard, a 
wonderful place to perform the same type of schooling is to enter your 
horse in a parade.  Then, if your horse goes ballistic over the bands, 
and the horns, and the streamers, and the crowds, all the kids will jump 
up and down and point and say "look at the dancing horsey."  And you can 
just smile and wave.  (Been there, done that.)
Seriously, don't expect cars to yield the right of way (they might...but 
then they might not).  Even if they are legally obligated to, I have yet 
to see that question appear on the Driver's Exam.  And if it 
did....well...most people would probably get it wrong.
kat
Orange County, Calif.