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      "text": "First, roads are chunked into connected segments that follow typical traffic routes and form longer supersegments.\nThe world is divided into regions that have similar driving behaviors and train region-specific GNNs.\nData represents the actual traversal times across segments and supersegments, which are used as node-level and graph-level labels for prediction, respectively.\nFor a given starting time, the GNN learns the travel time of each supersegment at specific points in the future.",
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