During a cross country trip, I keyed in a destination that was 2 hours away, through both urban and rural areas and through varying levels of rush hour traffic. I know they have ways of measuring instantaneous traffic levels, but how can they predict road conditions for multi-hour journeys?
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When you are using a mapping system real time, if traffic slows, the data returns to the navigation system indicating a slowdown. Think of how many people are using a navigation app, so the data is real time. Many times if traffic comes to a complete stop, before you even get to the slow areas, it may try to re-route you by providing an alternative route to take.
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