Originally Posted by
trooper
SO which figure did you use for the number of cars? Your "about" varied by 25%.....
..and from where diid you get the number of miles travelled by each and every car in the USA.....??
Just trying to understand how you came to a figure at all.....
Here's a chart that tells it like it is:
http://www-fars.nhtsa.dot.gov/Main/index.aspx