Delivery Time-Out Settings (Addressing: Truck cannot deliver X. No valid destination")
A truck that has initiated a delivery request cannot cancel it unless the initial building that provided the request updates.
Example: when dealing with multiple dumpsites, you could get swarmed with a huge number of trucks grabbing dirt and then getting stuck when the dumpsite is fulfilled. Instead of searching for a new location to dump or return to storage, trucks are stuck with "No valid destination" until the original dumpsite that ordered the delivery is modified.
IE: Building NEW storage for the good or establishing NEW dumpsites with the same good with a DIFFERENT dumpsite will not wake the truck.
For trucks that were NOT assigned to the storage that pushed the dump request it is hard to track, especially on big maps. Without modifying the original dump request, players must ONE at a time hit the unity remove button.
Suggestion: Trucks that cannot deliver should time-out after 60 days and reevaluate their cargo, band-aid fix: add "Vehicle" setting on Unity tool.