Everyone hates traffic jams. But, have you ever wondered what causes the most dreaded traffic jams? A simple act such as changing traffic lanes can cause a ripple effect which may end up as traffic congestion. The below infographics explains them all.
![Why Traffic Jams Happen width=](http://www.blogcdn.com/www.autoblog.com/media/2011/02/science-of-traffic-jams-opt.png)
Via:
Car Insurance Guide
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