Multi-Grained Temporal-Spatial Graph Learning for Stable Traffic Flow Forecasting

• URL: http://arxiv.org/abs/2508.00884v1
• Date: Fri, 25 Jul 2025 08:08:22 GMT
• Title: Multi-Grained Temporal-Spatial Graph Learning for Stable Traffic Flow Forecasting
• Authors: Zhenan Lin, Yuni Lai, Wai Lun Lo, Richard Tai-Chiu Hsung, Harris Sik-Ho Tsang, Xiaoyu Xue, Kai Zhou, Yulin Zhu,
• Abstract summary: Traffic flow forecasting is a highly nonlinear problem with complex temporal-spatial dependencies.<n>We propose a multi-grained temporal-spatial graph learning framework to adaptively augment the globally temporal-spatial patterns.<n>Our proposed model can mine the hidden global temporal-spatial relations between each monitor stations.
• Score: 4.16120820588549
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Time-evolving traffic flow forecasting are playing a vital role in intelligent transportation systems and smart cities. However, the dynamic traffic flow forecasting is a highly nonlinear problem with complex temporal-spatial dependencies. Although the existing methods has provided great contributions to mine the temporal-spatial patterns in the complex traffic networks, they fail to encode the globally temporal-spatial patterns and are prone to overfit on the pre-defined geographical correlations, and thus hinder the model's robustness on the complex traffic environment. To tackle this issue, in this work, we proposed a multi-grained temporal-spatial graph learning framework to adaptively augment the globally temporal-spatial patterns obtained from a crafted graph transformer encoder with the local patterns from the graph convolution by a crafted gated fusion unit with residual connection techniques. Under these circumstances, our proposed model can mine the hidden global temporal-spatial relations between each monitor stations and balance the relative importance of local and global temporal-spatial patterns. Experiment results demonstrate the strong representation capability of our proposed method and our model consistently outperforms other strong baselines on various real-world traffic networks.

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