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[EN] Nowadays multi-criteria methods enable non-monetary aspects to be incorporated into the assessment of infrastructure sustainability. Yet evaluation of the social aspects is still neglected and the multi-criteria assessment of these social aspects is still an emerging topic. Therefore, the aim of this article is to review the current state of multi-criteria infrastructure assessment studies that include social aspects. The review includes an analysis of the social criteria, participation and assessment methods. The results identify mobility and access, safety and local development among the most frequent criteria. The Analytic Hierarchy Process and Simple Additive Weighting methods are the most frequently used. Treatments of equity, uncertainty, learning and consideration of the context, however, are not properly analyzed yet. Anyway, the methods for implementing the evaluation must guarantee the social effect on the result, improvement of the representation of the social context and techniques to facilitate the evaluation in the absence of information. ; This research was funded by the Government of Chile under the Doctoral Fellowship Program Abroad (grant CONICYT-2015/72160059), the project DIUFRO DI14-0096 and the Spanish Ministry of Economy and Competitiveness along with FEDER funding (Projects BIA2014-56574-R and BIA2017-85098-R). ; Sierra-Varela, LA.; Yepes, V.; Pellicer, E. (2018). A Review of Multi-Criteria Assessment of the Social Sustainability of Infrastructures. Journal of Cleaner Production. 187:496-513. https://doi.org/10.1016/j.jclepro.2018.03.022 ; S ; 496 ; 513 ; 187

[EN] Nowadays, sustainability assessment tends to focus on the biophysical and economic aspects of the built environment. The social aspects are generally overestimated during an infrastructure evaluation. This study proposes a method to optimize infrastructure projects by assessing their social contribution. This proposal takes into account the infrastructure¿s interactions with the local environment in terms of its potential contribution in the short and long term. The method is structured in three stages: (1) preparation of a decision-making model, (2) formulation of the model, and (3) implementation of the model through optimization of infrastructure projects from the social sustainability viewpoint. The theory of Bayesian reasoning and a harmony search optimization algorithm are used to carry out the research. The paper presents the application to a case study of a set of alternatives for road infrastructure projects in El Salvador. This approach creates a model of participative decision-making. The results show that the method can distinguish socially efficient alternatives from the short and long-term contributions. In addition, the results suggest that some variables are less sensitive to the short and long-term maximization, while others vary their values to improve one objective or the other. The findings are directly applied to a real case. The method can be employed in the infrastructure formulation and prioritization phases and complemented with economic and environmental sustainability assessments. ; This research was funded by the Government of Chile under the Doctoral Fellowship Abroad Program (grant CONICYT-2015/72160059) and the Spanish Ministry of Economy and Competitiveness along with FEDER funding (project BIA2014-56574-R). The authors are grateful to both the United Nations Development Programme and the Ministry of Public Works, Transportation, Housing and Urban Development of El Salvador for their participation in the implementation of the proposed method (Project 00074250). ...