Abstract
Taxi is one of the most common public transport, predicting taxi demand precisely within an area is of great significance for improving efficiency of traffic. Taxi demand is spatial-temporal data, and highly influenced by many external factors, such as time, weather. So there are two main problems on taxi demand prediction: the one is that modeling both spatial and temporal non-linear correlations is not easy, the other is that real scenarios exist temporal but non-spatial side information, which is hard to be fused with spatial-temporal taxi demand. To handle the two problems, in this paper, we propose a novel Side information fused Spatial-Temporal Network(SideInfo-STNet) framework to model correlations of time, space and side information. The framework has three main components: Spatial-temporal Taxi Demand (transforming raw taxi demand to taxi demand image sequences); Side Information (transforming side information to time series vectors); SideInfo-STLSTM (extending LSTM to has convolution structures and fusing side information into LSTM gate units). By using SideInfo-STNet to conduct extensive experiments on large-scale TLC trips of New York City, we validate that our model outperforms traditional and deep learning based models on taxi demand prediction.
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