Thanks for checking this. I don't remember the details from 5 years back, but I think StreetComplete at the time asked if there was a visible sign for speed limit. I checked on sight and reported a "no".
Since this is a not really a city center road, but rather a speedway (multi-lane, walled by concrete on both sides, separating footpath and everything else, crossings by tunnel / stop light only), the app might have assumed a wrong speed limit. This issue might apply to similar reports of "no speed limit sign" at that time.

Again, apologies and thanks for spotting this.

My apologies. The app I am using changed their login right after I started traveling and I didn't have my login information with me. I am happy to do any manual edits that will help disentangling the data dump – just let me know how I can help.

Hi Brandon,
you are right. Sorry, not sure how that happened. Thanks for the correction.
Best,
Mao-PU

Sorry about that and thank you for correcting it.

Yes, I can confirm that I have been travelling and to all these places.

I used the StreetComplete app to enter the data and set the "Auto-Sync" to "on WiFi only", which might have been the reason for the large number of changes submitted at once. If the large area is a problem, it might be useful to suggest a change in the app to submit data area by area…

What would be a 'sensible area'? Neighbourhood, city, county, country?