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Big cities require good transit (or they're not really big at all)

Effective public transport increases the productivity of a city. Somewhat obvious, but the scale is not. A city without effective public transport is a smaller city. The network effects of being able to connect with others who might spawn ideas and opportunities are diminished by not having effective transport. Transit systems that rely upon buses without priority, which have their service level cut by the congestion of personal automobiles at peak times, suffer as a result.

Also notable, is that how areas of the city underserved by public transit are from a economic point of view, not truly part of the city. Improving transit is critical to improving the economic well being of such areas.

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