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Roads pollute cities, eat up public space and fragment habitats. Could moving them underground help?
1 de may. de 2016 · These giant elevated structures through down-town areas are now seen as unsightly, noisy, possibly unsafe, and provide only limited access to areas adjacent to the freeway. Many cities are considering or in the process to replace the elevated highways by urban road tunnels.
13 de sept. de 2018 · Given the saturation of existing metropolitan spaces, underground roads could be the perfect solution for future urban transportation problems. Going Underground 55% of the world’s population live in urban areas, a figure that is expected to grow to 68% by 2050, says a recent UN report.
14 de abr. de 2020 · But other cities have removed their highways entirely or relocated them underground, which repairs divided neighborhoods and opens new vistas. San Francisco’s Octavia Boulevard, completed in 2003, replaced the former Central Freeway, damaged in the 1989 Loma Prieta earthquake.
Underground urban roads and highways typically traverse deep below a city from portals at each end that tie into existing service road networks. By going deep, the tunnels avoid building foundations and other in-place services, and leave space closer to the surface for future installations.
This chapter traces the evolution of urban underground space and illustrates how the progressive and piecemeal development of underground space poses significantly more restrictions on future development than in the cases of surface facilities and infrastructure development.
27 de may. de 2021 · Most highway projects fit into a broader program of urban renewal that reshaped American cities in the mid-20th century, displacing more than a million people across the country, most of them...
