I can understand why you'd want the tool for a single segment, but the point is it's pretty much useless even on that single segment.
It doesn't matter how many nodes a segment has. The impact on the server is infinitesimal. As far as making a basemap segment easier to adjust, you have two options. Either clear all geometry entirely and rebuild, or hold D and swipe back and forth over the nodes you want to clear away. Holding D and swiping can clear tons of nodes in a very quick time, allowing you to only adjust the part of the road you were wanting to adjust.
It doesn't matter how many nodes a segment has. The impact on the server is infinitesimal. As far as making a basemap segment easier to adjust, you have two options. Either clear all geometry entirely and rebuild, or hold D and swipe back and forth over the nodes you want to clear away. Holding D and swiping can clear tons of nodes in a very quick time, allowing you to only adjust the part of the road you were wanting to adjust.
Re: Toolbox Permissions USA