This is kind of a hijack, but it's at least related: Are there any websites/apps that can approximate a solution for road destinations in the real world?
For example, given a list of cities, an approximate solution on actual roads to visit all of them once?
While not entirely obvious on Google Maps you can add multiple stops and reorder them for fastest route (including traffic which you might not be able to get w/ OR-Tools), https://support.google.com/maps/answer/144339
I'd say this is pretty decent but it's not a proper TSP app, since it expects the first and last points as fixed but has the option to change the order of the other stops
For example, given a list of cities, an approximate solution on actual roads to visit all of them once?