City-wide 30 km/h speed limits have gained increasing attention across Europe as an important policy for improving road safety, enhancing urban quality of life, and supporting sustainable transport. Lower speeds are expected to reduce both the number and seriousness of collisions, while also making walking and cycling more attractive. After Spain introduced a nationwide 30 km/h urban speed limit in 2021, Greece became the second European country to adopt a comparable policy, applying a 30 km/h speed limit to all single-lane urban roads in June 2025. This study examines public attitudes and preferences regarding the acceptance of city-wide 30 km/h speed limits in Greece. Data were collected through a structured questionnaire completed by 800 residents nationwide. Exploratory factor analysis was used to identify the main dimensions shaping attitudes. The results indicated generally positive public views, with support reaching approximately 60%. Acceptance was strongly associated with beliefs about safety improvements and congestion impacts, as well as driving habits and socio-demographic factors. Women, middle-aged respondents, and moderate drivers were more supportive. By contrast, frequent speeders and respondents doubtful of its safety value were less likely to approve. The belief that the measure can reduce crashes was the strongest predictor of acceptance, while confidence in fair enforcement also increased support. The findings suggested that clear communication of safety benefits, reassurance about congestion and equitable enforcement are essential for maintaining trust and compliance. Targeted awareness campaigns for younger male drivers and habitual speeders may further strengthen long-term acceptance.
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