ST-GIN: An Uncertainty Quantification Approach in Traffic Data Imputation with Spatio-temporal Graph Attention and Bidirectional Recurrent United Neural Networks
This work addresses data quality issues in intelligent transportation systems, offering an incremental improvement for researchers and practitioners dealing with incomplete traffic datasets.
The paper tackles the problem of missing values in traffic data by proposing ST-GIN, a deep learning method that uses graph attention and bidirectional recurrent networks to capture spatio-temporal correlations, achieving superior performance over benchmarks in imputation tasks.
Traffic data serves as a fundamental component in both research and applications within intelligent transportation systems. However, real-world transportation data, collected from loop detectors or similar sources, often contains missing values (MVs), which can adversely impact associated applications and research. Instead of discarding this incomplete data, researchers have sought to recover these missing values through numerical statistics, tensor decomposition, and deep learning techniques. In this paper, we propose an innovative deep learning approach for imputing missing data. A graph attention architecture is employed to capture the spatial correlations present in traffic data, while a bidirectional neural network is utilized to learn temporal information. Experimental results indicate that our proposed method outperforms all other benchmark techniques, thus demonstrating its effectiveness.