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In page Altoona, Pennsylvania:

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As is typical in many Rust Belt cities, the economic downturn of the railroad resulted in the closure of many of the downtown's landmark stores and industries. The simultaneous rise in prominence of the automobile shifted commercial development to the suburbs of Altoona. However, through recent revitalization efforts, Altoona's downtown maintains a significant level of economic vitality and hosts few office and residential vacancies.[citation needed] The downtown maintains a significant focus on pedestrian-oriented development, as evidenced by the presence of more pedestrian bridges and underpasses across the railroad tracks (connecting the two parts of downtown) than automobile crossings.