Create curved labels along a line in ArcGIS Online map

[BronwenHughes]

I would like to place curved labels along a roads layer in my ArcGIS Online map. The road name labels are straight at present, and I would like them to follow the curve of the roads. How do I do this?

[BronwenHughes]

I submitted my question to ESRI support and received this answer: "I have tested in Map Viewer and Map Viewer Beta, and, at this time, it is not possible to create curved labels along roads within ArcGIS Online."

Hence I have posted this as an ArcGIS Idea: Curved labels along lines in ArcGIS Online maps   If you would also like to see this functionality included in AGOL, please vote for my idea.