I can fix this up a few days later by reviewing the other nearby features. I was kinda worried about this changeset that I am avoiding non-flat calibration. (EG avoiding Chi Fu Fa Yuen.) And then if I go for a throughout review, the changeset size could be huge; you may see how I have made several 100-item changesets already just for calibration.

It is especially annoying when the buildings are also misaligned because sometimes there are a lot of other "dependent" features drawn on top of the misaligned buildings. To limit the changeset size I sometimes just pretend the other parts are correct, and then smoothen the curves near the start and the end, to make it less obvious.

But still I am noticing and learning to center on the road median, that you can be assured.

But wait, it seems iD editor has a measurement tool? I swear iD editor has too many features that are not obvious.