How Bridges Work

Bridges support tremendous weight, span huge distances and all the while withstand the greatest forces of nature. Find out about these engineering feats (as well as some of the flaws).

How Intelligent Highways Will Work

If you were on the road for the holidays, you probably spent some time staring at the bumper in front of you. Can you imagine a world without gridlock? Learn about some high-tech traffic management.

How do truck weigh stations work?

While traveling along the Interstate, you may have noticed that truck weigh stations occasionally dot the highway. What are these weigh stations for, and how do they measure the weight of a truck? Find out the answer in this article.

Why are the insides of tunnels usually covered in ceramic tile?

I've noticed that the insides of road and subway tunnels are usually covered in ceramic tile. Is there any particular reason for this or is it simply convention?