城市交通模型是理解与预测城市内部人员与货物流动的重要工具，对交通规划至关重要。城市交通分析所采用的空间尺度是决定模型洞察力的关键因素，因为它会影响模型的性能表现。因此，为反映内在动态，有必要在适当的空间尺度下评估城市交通模型。本研究系统评估了三种流行的都市交通模型——引力模型、辐射模型和访问量模型——在不同空间尺度下的表现。结果表明，尽管访问量模型始终优于引力模型和辐射模型，但在某些三者共用的适宜空间尺度下，各模型的表现差异不大。有趣的是，在所有模型表现均较差的空间尺度上，访问量模型的性能下降最为显著。此外，基于传统行政边界的结果表现不如基于距离的聚类方法。跨空间尺度对城市交通模型的交叉检验还揭示了城市结构的空间组织特征。

Urban mobility models are essential tools for understanding and forecasting how people and goods move within cities, which is vital for transportation planning. The spatial scale at which urban mobility is analysed is a crucial determinant of the insights gained from any model as it can affect models' performance. It is, therefore, important that urban mobility models should be assessed at appropriate spatial scales to reflect the underlying dynamics. In this study, we systematically evaluate the performance of three popular urban mobility models, namely gravity, radiation, and visitation models across spatial scales. The results show that while the visitation model consistently performs better than its gravity and radiation counterparts, their performance does not differ much when being assessed at some appropriate spatial scale common to all of them. Interestingly, at scales where all models perform badly, the visitation model suffers the most. Furthermore, results based on the conventional admin boundary may not perform so well as compared to distance-based clustering. The cross examination of urban mobility models across spatial scales also reveals the spatial organisation of the urban structure.