Transmission Discounters

If you've ever driven west on Interstate 80 through Nebraska, you've seen one of the flattest and emptiest roads in America ... and you probably had some time to ponder life's most important questions. For example, why is the highway called "I-80," anyway? And why do some interstate names have one, two or three digits?

What's the Secret Behind the Numbers on the Interstate Signs? Why is one road named I-5 while another is I-480? We take a closer look at the digits on those red, white and blue shield-shaped signs.

We're always trying to figure out what the Golden Age of cars was, but the truth is that ever since World War II, we've lived in something of an endless Golden Age.

15 cars that changed the world Our criteria were simple: Was the car a smash hit at the time, historically important, and did it change the game or exert a huge influence?