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How traffic signals work

Traffic is one of life in big cities’ biggest frustrations. Sometimes we can spend hours just waiting in traffic to travel a seemingly short distance. But what have engineers done over the years to help alleviate this problem? Well, one of the first innovations in the arena of traffic management was traffic signals and the science and engineering behind them is pretty fascinating.

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Stop robocalls once and for all

Robocalls are not only annoying, but they scam Americans out of millions every year. Learn Kim's tricks for stopping them for good in this handy guide.

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