Robust Two-Stage Transport Data Imputation with Changepoint Detection and Tucker Decomposition.

Transport data is an essential resource for understanding traffic patterns and informing transport planning and policy. However, data-driven transportation research is often haunted by the prevalent issue of missing data, which can significantly impact the accuracy and reliability of data analysis. Despite extensive efforts in developing effective data imputation models, it is found that their results can deteriorate when faced with complex missing patterns and high non-stationarity of time series. To address these issues, we propose a two-stage imputation framework with changepoint detection and Tucker decomposition. Time series decomposition is embedded in the proposed framework to capture the temporal characteristics of transport time series. Experiment results demonstrate that our proposed method outperforms state-of-the-art methods in various challenging missing scenarios.