There are about 250 million highway registered vehicles in the USA, not including motor cycles. There are about 800 million heavy and light vehicles on the roads worldwide today.
a LOT ! (:
Lots and lots... Get it?But really lots of them.
In 2005 there were 241,000,000 Cars registered in the US.
"In 1900 only 4,192 passenger cars (and no trucks or buses) were built in the United States."