Is it possible to add a network dataset I created from my own street network in ArcMap to my ArcGIS Online account? I basically want to use the network tools available in Online, but instead of the ESRI-provided ND, I'd want to use my own.
ArcGIS Online does not support publishing routing services. You have to use ArcGIS Enterprise to publish routing services using your own network dataset and configure the services with your enterprise portal. This will allow you to access the same tools such as the directions pane or the analysis tools in the Map Viewer app but using your own network dataset.
Retrieving data ...