Abstract
In 2007, the excavation of the M-30 ring road located in Madrid and the creation of a green corridor either side of the Manzanares river brought significant change to the metropolitan area. The corridor and linear park which it provided were designed to contribute to the regeneration of the fluvial ecosystem, establish links among residents on each side of the river and promote cultural and leisure activities. This paper provides a sustainability analysis of the excavation of the M-30 (involving the socio-economic and environmental impact) 14 years after its construction. In order to show such an impact, an analysis of the area both prior to the project and after completion, as well as a hypothetical solution that uses improved materials, has been performed. This entails use of the multi-criteria decision-making model named MIVES (initials in Spanish, modelo integrado de valor para una evaluación sostenible). The MIVES method is based on the application of value functions of sustainability indicators selected by socio-economic and environmental criteria, chosen by experts. Results from analysis showed that the excavation of the M-30 considerably improved the sustainability of the area (sustainable index 3.43 and 6.26 both before and after the excavation works). However, use of improved materials in contrast with the application of conventional materials slightly improved the sustainability of the work (Sustainability Index 6.26 and 6.74, respectively, of the conventional materials).
Highlights
The city of Madrid holds about 3.5 million of inhabitants and its metropolitan area is over 6 million [1]
It could be assumed that the first solution, the non-burial of the M-30 stretch, means that the tunnels and park are not built and does not imply any construction cost
MIVES is a powerful tool and a highly suitable method available to evaluate the sustainability of the structures in various scenarios in which a high number of heterogeneous factors are involved
Summary
The city of Madrid holds about 3.5 million of inhabitants and its metropolitan area is over 6 million [1]. Madrid has worked on enhancing the sustainability of the city by improving transport infrastructure (such as urban ring roads and high occupancy vehicle lanes), green areas The M-30 is the busiest one and that which passes closest to the city center, contributing 24.2% of the metropolitan area daily traffic and 9.4% of that of the greater Madrid region, with an average annual daily traffic about. Sci. 2020, 10, 7368 environmental problems such as noise and air pollution [10] These issues were especially severe on the west sector where the highway flowed over an extremely developed area, causing a significant.
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