Sometimes it is the simple things. Today as I was driving my usual route and merging onto the freeway, a semi-truck tried to merge into my lane! There was a concrete barrier on my right, a moving 18-wheeler on my left, and a string of cars behind me. Nowhere for me to go. So I laid on my horn. "Hey! I'm here! Don't hit me!" Fortunately for both of us, the driver realized that two vehicles cannot coexist within the same space and moved back into the correct lane. Whew! Close call.
This event got me thinking though. I began to ponder all the safety improvements implemented in cars since they became common in our country. Detroit was apparently a city of death at the dawn of the age of the automobile and the car horn was already in practice there. There are even stories of British flag wavers/horn honkers walking in front of cars before cars were common in England to warn people of the approaching mobile machine.
"In the early 1800's, steam carriages were becoming popular in Britain. For the safety of pedestrians and animals, a law was passed stating that "…self-propelled vehicles on public roads must be preceded by a man on foot waving a red flag and blowing a horn."" --cogopa.com