Unfriendly Architecture

People in Buenos Aires were filling the spaces under the bridges with homes built with waste materials like wooden boxes, carton and so. Later they built permanent  walls and installed shops under the bridge. The  Authorities gave them formal names, like Villa 514. See pic below. 

Architectural creativity solved the problem. See pic above. It also helps to avoid crossing lanes under the bridge. This is the Argentine version of Brutalist Architecture.