Towards the Resilience of Attica Region’s Provincial Road 3 in Greece, Due to Slope Failure by Applying Civil Engineering Techniques and a Semi-Quantitative Assessment Approach

Landslide mitigation works, which are used to retrieve the damaged (from the landslide) environment, sometimes lack methodologies to integrate resilience into infrastructure projects economically and sustainably. The necessity of developing resilience in civil engineering technical works is getting more obvious since the outcomes from natural disasters have become more frequent since 2000 and onwards. This article presents the slope failure mitigation measures through a resilience framework, focusing on a case study from a road adjacent to a local stream in Greece. A geological–geotechnical study and mitigation measures were carried out in the context of the restoration of the road surface and the stability of the stream slopes. The purpose of this article is to describe the process of implementing aspects of resilience into the civil engineering technical works and to evaluate the effectiveness of implemented strategies for improving the resilience of infrastructure. It was found that using a semi-quantitative methodology (RES for estimating the slope instability index and resilience matrix for the evaluation of the constructed technical works) can associate designers and subsequently decision makers with valuable tools for facilitating decision-making for more sustainable solutions and contributing to the long-lasting duration of civil engineering projects.