[2020] Trash Transfers and deliveries just not happening even with my 81% Traffic

Originally posted by Mr. Monday: Yeah, just turn that option off and left your city grow back to normal. And in the future make numbered hard saves (ie: cityname 01, cityname 02, and so on) instead of relying on the autosaves so you'll always have something to fall back to in case something else goes wrong later. If you feel like you have too many saves just move all but the most recent one to a different folder.

This is very good advice! Generally it's always much better to make new saves than save over the same file. You can always move old saves out of the folder and keep them elsewhere on your computer as backups, so you don't have a ton in your savegame list. :)