Effects of urban highways on their proximal neighbourhoods: A Space Syntax analysis
The inauguration of the tunnel under Kennedy Avenue in October 2017 in Santiago, transformed the last section of the city’s east-west highway that still maintained local road characteristics in an expressway. With this, the first stage of urban highways that came into operation twenty years ago, whi...
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| Autors principals: | , , |
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| Format: | Online |
| Idioma: | spa |
| Publicat: |
Universidad Diego Portales
2018
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| Accés en línia: | https://www.revista180.udp.cl/index.php/revista180/article/view/578 |
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| Sumari: | The inauguration of the tunnel under Kennedy Avenue in October 2017 in Santiago, transformed the last section of the city’s east-west highway that still maintained local road characteristics in an expressway. With this, the first stage of urban highways that came into operation twenty years ago, which have been questioned from different fronts, was ended. Using the theoretical and methodological framework of Spatial Syntax, the present work seeks to deepen the understanding of the effects (positive and negative) of the current urban highway network on its adjacent neighbourhoods.All highways that penetrate the urban fabric were analysed (Autopista Central, Costanera Norte, Acceso Sur to Santiago and Américo Vespucio) in three scenarios; base situation, free city and toll city, considering a buffer of 500 meters from each.The results showed that while Global Integration, or the global accessibility of all the street network, shows a high variation in the four highways analysed, Local Integration (accessibility at neighbourhood level) does not show major changes. The variations at global level can be explained by the interventions of neighbouring roads to the highway: while in some cases an effort was made to generate continuity among both sides, even where previously there was none (e.g. Costanera Norte build new bridges over Rio Mapocho); in others the highway split neighbourhoods that previously were one.This shows that the negative effects of highways in neighbourhoods can be mitigated (to a large extent), with an adequate design of the connections to the urban network. Twenty years after the first urban highway in Santiago was built, it seems necessary that these infrastructures begin to be evaluated as urban projects with consequences on their surroundings. |
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