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How Roundabouts Work

science.howstuffworks.com/engineering/civil/roundabouts.htm

Roundabouts aren't all that complicated, but they're still relatively rare in the U.S., especially when compared with France.

Are You a Geography Guru?

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The world is a large and expansive place, with lots to know and discover. But just how much do you know about the lay of the land? Fancy yourself a geography guru? If so, take on our challenge to prove it.

How E85 Ethanol Flex Fuel Works

auto.howstuffworks.com/fuel-efficiency/alternative-fuels/how-e85-ethanol-flex-fuel-works.htm

Learn what E85 is and why some people believe this alternative fuel has the potential to reduce our nation's dependence on foreign oil.

10 Women Who Broke New Ground in Engineering

science.howstuffworks.com/engineering/structural/10-women-in-engineering.htm

One of the most travelled stretches of U.S. highway was designed by a woman who loved mathematics and wasn't interested in being a teacher. Who was she, and where is it?

Do You Know the Meaning of All of These International Road Signs?

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Stop! Yield! No Parking! If you can keep these signs straight, then this quiz is for you. Find out just how well you know the rules of the road... around the world!

How to Calculate Fuel Cost

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Want to know how to calculate fuel cost? Visit HowStuffWorks to learn how to calculate fuel cost.

How Much Air Pollution Comes From Cars?

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You see it every time smoke billows from your car's exhaust pipe. There's no denying that vehicles are major contributors to air pollution.

How an Oversize Load Works

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An oversize load can be a dangerous thing to tow. Learn what constitutes an oversize load at HowStuffWorks.

Can owning a hybrid car get me an HOV decal?

auto.howstuffworks.com/fuel-efficiency/hybrid-technology/owning-hybrid-hov-decal.htm

Can owning a hybrid get me an HOV decal? Find out if owning a hybrid can get you an HOV decal at HowStuffWorks.

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