The importance of promoting sustainable and environmentally responsible practices is becoming increasingly recognized in all domains, including tourism. The impact of tourism extends beyond its immediate stakeholders and affects passive participants such as the environment, local businesses, and residents. City trips, in particular, offer significant opportunities to encourage sustainable tourism practices by directing travelers towards destinations that minimize environmental impact while providing enriching experiences. Tourism Recommender Systems (TRS) can play a critical role in this. By integrating sustainability features in TRS, travelers can be guided towards destinations that meet their preferences and align with sustainability objectives. This paper investigates how different user interface design elements affect the promotion of sustainable city trip choices. We explore the impact of various features on user decisions, including sustainability labels for transportation modes and their emissions, popularity indicators for destinations, seasonality labels reflecting crowd levels for specific months, and an overall sustainability composite score. Through a user study involving mockups, participants evaluated the helpfulness of these features in guiding them toward more sustainable travel options. Our findings indicate that sustainability labels significantly influence users towards lower-carbon footprint options, while popularity and seasonality indicators guide users to less crowded and more seasonally appropriate destinations. This study emphasizes the importance of providing users with clear and informative sustainability information, which can help them make more sustainable travel choices. It lays the groundwork for future applications that can recommend sustainable destinations in real-time.

翻译：促进可持续性和环境友好型实践的重要性在各领域（包括旅游业）中日益得到认可。旅游业的影响不仅局限于直接利益相关者，还会涉及环境、本地企业和居民等被动参与者。特别是城市旅行，通过引导游客前往既能减少环境影响又能提供丰富体验的目的地，为推广可持续旅游实践提供了重要机遇。旅游推荐系统在此可发挥关键作用。通过在旅游推荐系统中整合可持续性特征，可引导游客前往既符合其偏好又契合可持续性目标的目的地。本文研究了不同用户界面设计元素如何影响可持续城市出行选择的推广。我们探讨了多种特征对用户决策的影响，包括交通方式的可持续性标签及其碳排放量、目的地流行度指标、反映特定月份人流量的季节性标签，以及综合可持续性评分。通过包含模拟界面的用户研究，参与者评估了这些特征在引导他们选择更可持续旅行选项方面的有用性。研究结果表明，可持续性标签显著影响用户选择低碳足迹选项，而流行度和季节性指标则引导用户前往人流较少且季节适宜的目的地。本研究强调了向用户提供清晰且信息丰富的可持续性信息的重要性，这有助于他们做出更可持续的旅行决策，并为未来实时推荐可持续目的地的应用奠定了研究基础。