On 05/16/2016 08:38 PM, Dean Hoffman wrote:


I ran across this while looking for a vehicle barrier gate for our
farm.
http://www.qcsupply.com/50008-drive-thru-electric-gate-adj-13-19.html
My parents' neighbors had this version:
http://www.grahamindustries.ca/wp-content/uploads/2010/10/CattleGuard.jpg
People always called it a cattle guard. I have no idea if it would work
for other livestock.




Out west, they'd put closely spaced RR tracks in the ground spaced in
such a way that the cattle's hoofs would get caught or at any rate made
it too difficult to cross.

It worked so well that in some places, all they had to do was paint the
lines on the road and the cattle would keep away