Cyclic Graph Attentive Match Encoder : A Novel Neural Network For OD Estimation

Origin-Destination Estimation plays an important role in traffic management and traffic simulation in the era of Intelligent Transportation System (ITS). Nevertheless, previous model-based models face the under-determined challenge, thus desperate demand for additional assumptions and extra data exists. Deep learning provides an ideal data-based method for connecting inputs and results by probabilistic distribution transformation. While relevant researches of applying deep learning into OD estimation are limited due to the challenges lying in data transformation across representation space, especially from dynamic spatial-temporal space to heterogeneous graph in this issue. To address it, we propose Cyclic Graph Attentive Matching Encoder (C-GAME) based on a novel Graph Matcher with double-layer attention mechanism. It realizes effective information exchange in underlying feature space and establishes coupling relationship across spaces. The proposed model achieves state-of-the-art results in experiments, and offers a novel framework for inference task across spaces in prospective employments.