Human mobility significantly impacts various aspects of society, including transportation, urban planning, and public health. The increasing availability of diverse mobility data and advancements in deep learning have revolutionized mobility modeling. Existing deep learning models, however, mainly study spatio-temporal patterns using trajectories and often fall short in capturing the underlying semantic interdependency among activities. Moreover, they are also constrained by the data source. These two factors thereby limit their realism and adaptability, respectively. Meanwhile, traditional activity-based models (ABMs) in transportation modeling rely on rigid assumptions and are costly and time-consuming to calibrate, making them difficult to adapt and scale to new regions, especially those regions with limited amount of required conventional travel data. To address these limitations, we develop a novel generative deep learning approach for human mobility modeling and synthesis, using ubiquitous and open-source data. Additionally, the model can be fine-tuned with local data, enabling adaptable and accurate representations of mobility patterns across different regions. The model is evaluated on a nationwide dataset of the United States, where it demonstrates superior performance in generating activity chains that closely follow ground truth distributions. Further tests using state- or city-specific datasets from California, Washington, and Mexico City confirm its transferability. This innovative approach offers substantial potential to advance mobility modeling research, especially in generating human activity chains as input for downstream activity-based mobility simulation models and providing enhanced tools for urban planners and policymakers.

利用普遍和开源数据开发了一种新的生成式深度学习方法来进行人类流动性建模和合成，并能够通过本地数据进行微调，实现在不同地区对流动模式的适应和准确表示。该模型在美国的全国数据集上进行评估，在生成紧随真实分布的活动链条方面表现出优异的性能。对来自加利福尼亚、华盛顿和墨西哥城的州或城市特定数据的进一步测试证实了其可转移性。这种创新的方法在促进流动性建模研究方面具有巨大的潜力，特别是在为下游基于活动的流动性模拟模型生成人类活动链条的输入和为城市规划师和政策制定者提供增强工具方面。

深度活动模型：一种人类移动模式综合的生成方法