I'm slowly doing the classification of southern Peru based on Peruvian ministry of transport data (http://www.mtc.gob.pe/ available only via VPN in my country).

I'm mostly adding nodes, but some of main tracks was previously converted one by one from GPS tracks, so there I did some little simplification on these lines.

I reverted part of your change.
Drawing from aerial imaginery is perfectly ok for new paths (because everything is better than nothing). But for old paths you must be aware that aerial imaginery could be much older than previous change.

I have a question for you. What is a source of your changes? You just add a curves and harpins to road path, but it's definitely not true!
There is an area of new Jalalabad-Kazarman-Issyk-Kul road. I passed this road on 2016, while road works was going on and they simplified path, but everything was not ready (in example, there is a new bridge in different place). Satellite image is old and wrong right now.

I also drawn bridge on Hovd, but with a different changeset
changeset/43430993

Hovd starts from Khurgan lake and it's impassable during summer. Few years ago, there is also a bridge on Hovd in that village, but in different place.