The latest data comes from iOnRoad, the android and iPhone app that aims to improve driving in real time. Using computer algorithms and smartphone cameras, it detects cars in front of your vehicle, alerting you when you are in danger from a collision or sideswipe.
With data collected from drivers in one million downloads, iOnRoad has come up with a list of the worst cities to drive in. The usual suspects are here, concentrated on the East and West Coasts, but each has its own idiosyncrasies.
(Pittsburgh and Philadelphia ranked)
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