StreetMap Premium for ArcGIS data is downloadable through My Esri. For details, see the StreetMap Premium Download Install Guide.
StreetMap Premium for ArcGIS 2018 releases have the following improvements and enhancements:
North America Release 1
North America Release 1 includes a new ‘TruckMinutes’ impedance/cost attribute, and a ‘Vehicle Maximum Speed (km/h)’ parameter was added to the ‘TravelTime’ and ‘TruckTravelTime’ cost attributes for routing. For specific information on this release, see the Release Notes.