PeMS dataset travel distance matrix is not accurate #57
Description
I am working with PeMS Bay dataset. I discovered that the distance matrix in the dataset is not accurate.
For example, based on the "distances_bay.csv", the node "400001" can only connect to itself. However, based on the map's coordinates "sensor_locations_bay.csv", the node "400001" should have upstream and downstream nodes to connect with. Same problem with "400017", "400240", "400677" that they have no neighboring nodes (i.e., no from/to distances to other nodes) at all. Apparently they should have many neighboring nodes.