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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 for good with Kim’s new eBook

Robocalls interrupt us constantly and scam Americans out of millions of dollars every year. Learn Kim's best tricks for stopping annoying robocalls in this handy guide.

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