A city is easier to live in when it's easy to get around. But getting around is hard in many cities, especially for people who rely on public transit.
Take buses, for example. They may not run when you need them. They might take too long. Or they might not even get to your neighborhood at all.
Transit operators, city officials and people in the federal government all hope that big data will help them change public transportation to get transit where it will be most used.
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