I have a question for the community. Is it possible to calculate drive time areas using a custom local road network instead of that obtained from ESRI data? I have a network of off roads in a desert reserve that I want to calculate the drive time areas from rescue stations for search and rescue service purposes.
I think you will find better engagement for this question in one of our other forum threads as this one is for My Esri.
I looks like your questions might be best placed in ArcGIS Pro Questions or ArcGIS Online Questions.
However, to answer your questions, if you are doing this in ArcGIS Pro, you should be able to use a drive time area with your own network dataset. If you are doing this in ArcGIS Online, I don't think it is possible for you to use your own network dataset currently.