Thank you for your comments and supports, Bernard. We will upload changesets in moderate amounts and carefully check topology errors before uploading to OSM

Thank you for your response.
We are using the road network for rural areas - DRRP, downloaded from https://geosadak-pmgsy.nic.in/opendata/. However, we don't use it to directly import to OSM (if there is a way to do that, and we haven't tried this yet), because we understand the potential topology errors when bulk importing data to OSM, especially the road network. So we don't choose bulk import approach but update it one by one using the DRRP road as a custom basemap. We will study your link osm.wiki/Organised_Editing to understand, follow and apply it strictly to our updating strategy and guideline.
Thanks and best regards!

Dear Graeme Fitzpatrick.
First of all, thank you for your comments.
My name is Thang Quach, GIS team lead from Sovereign Solutions, and sovereign_khoipm is one of my team member. We are now working on a project of Updating OSM road for several States in India, including
1. KERALA, 2. TAMIL_NADU, 3. Andhra Pradesh, 4. TELANGANA, 5. KARNATAKA, etc.
Regarding your comments, in our updating guideline, we use official and reliable sources hosted as xyz tile services, used as a custom background when editing on OSM, keeping in mind that preventing touching existing buildings as much as possible.
We will recheck all changesets that have conflicts between our new roads and existing buildings. However, there are cases that the existing buildings are not digitized at correct location and we have no choice but accept crossing some buildings b/c we are now focusing on updating roads, not buildings, and hoping someone will correct the building in the future.
Finally, thank you for your comments, and I hope that we have more discussions when running this project

Finally, thank you for your comments, and I hope that we have more discussions when running this project