Perceived Urban Vulnerability to Slope Instability in a Road Corridor: A Hazard Sources–Exposed Elements–Response Capacity Assessment in Loja, Ecuador

Abstract

Slope instability in urban road corridors can generate cascading effects on mobility, road safety, infrastructure functionality, and local response systems. This study assessed perceived urban vulnerability to landslide-related instability along the Vía de Integración Barrial corridor in Loja, Ecuador, using a hazard sources–exposed elements–response capacity framework. A cross-sectional perception-based survey was administered to corridor users and nearby actors. From 506 collected responses, 432 valid questionnaires were retained after informed-consent and attention-check screening. Categorical and ordinal data were analyzed using descriptive statistics, Wilson confidence intervals, grouped perception-based indicators, exploratory Spearman correlations, and selected chi-square contrasts with Cramér’s V. The results showed that perceived vulnerability was closely associated with visible signs of physical deterioration, including roadway cracking, pavement subsidence, soil or mud falls, and visible runoff or seepage. In addition, 81.5% of respondents perceived landslide-related disruption during the next rainy season as likely or very likely. The most frequently prioritized interventions were drainage improvement (62.3%), slope stabilization and retaining works (43.3%), and control of unwanted water inputs (41.2%). Institutional response was perceived as weak, slow, or mainly reactive by 80.3% of respondents, while low trust in reporting channels was reported by 54.9%; responses indicating lack of knowledge about the responsible institution or reporting channel were retained separately. Broad willingness to engage in community-based monitoring reached 89.4%. The exploratory bivariate analyses indicated a consistent pattern of positive associations among perceived disruption likelihood, mobility impact, road-safety concern, institutional response, and reporting trust, without implying formal validation of a latent multidimensional construct. This study provides an applied framework for incorporating user-based evidence into slope-risk management, corridor maintenance, road-safety planning, and resilience-oriented urban governance in mountainous cities.