Final answer:
The transportation changes in cities by the 1820s resulted in the separation of rich and poor people into different neighborhoods.
Step-by-step explanation:
An effect of transportation changes in cities by the 1820s was that rich and poor people lived in separate neighborhoods. As cities grew and transportation improved, the wealthy could afford to move to more desirable areas, away from the noise and pollution of the city center. This created a clear divide between the rich and poor, with the wealthy residing in more spacious neighborhoods.
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