The server will be brought down while I apply this patch. (15-30 minutes downtime)
The was an issue with production not progressing when producing less than 1 unit per tick. This should now have been resolved.
Take note: You need 1 machine per 1 Ton storage in each truck or they will not work. Similarly you need 1 machine per 10 passengers in each taxi.
Also: Producing vehicles need massive transport - each 1.5 ton truck needs 1.5+ ton transport. Without that transport capacity, production will not progress past 100%.