Freight Delivery Truck Respawn
Each industrial building gets its own truck to deliver freight.
The truck will locate nearby available orders and attempt delivery.
Delivery may involve multiple buildings.
All the freight on the truck must be delivered before the return trip starts.
If the truck returns from delivery quickly, it will spawn once per hour - each industrial building has its own timer.
This way you get 24 truck deliveries per day.
If the truck is delayed, does not return in one hour (before the next truck would spawn...
then the next truck doesn't spawn.
The building resets the clock for another hour.
This can happen when the gets stuck in traffic, or its freight shipment is far away.
In this case, you get less than 24 truck deliveries per day.
For example: if a truck takes 2.5 hours to return, the next truck will spawn in 0.5 hour.
The building keeps the timer.
If this happens consistently to the same building, you'll get 8 truck shipments per day.
If your city suffers complete gridlock, you may get down to 2 truck shipments per day.
Solving the problem If you switch to industry view, and you observe an industry building which never hits 0 freight (empty yellow bar)
- then you have identified a building that really needs better freight shipping.
Either solve the traffic jams, or place a freight accepting building close to the industry.
Watch the truck before you try to solve the problem.
Freight accepting buildings include commercial buildings, trade depot with freight attachment, trade port with freight attachment, many service buildings (power, sewage), and the road out of the city (although I haven't seen that last one accept freight yet).
gaming.stackexchange.com/users/9192/Amy B
Besides zoning more commercial, the intended solution is to build nearby Trade Depots (Specialization: Trade).
Airports can be modified to accept freight as well.
Unfortunately, as of Patch 1.4, industrial buildings will often ignore Trade Depots, even if they are less than a block away.
Sometimes they will drive several blocks to get to a Trade Depot, so it appears to be a bug in however they search.
gaming.stackexchange.com/users/36145/pfayze
I am not entirely sure, but once I added a Trade Depot my industry seemed a lot happier.
I didn't get any more "can't find buyers for my freight
" messages
and I didn't get any more abandoned industry buildings.
So I think having the Trade Depot offsets for commercial not having enough buying power for what industry is producing.
gaming.stackexchange.com/users/13049/RationalGeek
Here is what I think know.
Goods are shipped from industrial buildings to commercial buildings.
If commercial is full (no demand) then industrial buildings will accumulate goods.
If a industrial building becomes full, then it stops working (bad).
Eventually the industrial building will close down.
If you add a trade depot then industrial buildings can ship excess goods ("freight") to the trade depot.
What I do not know/understand.
Why do industrial buildings not ship excess freight to one of multiple open trade depots?
The trade depots have open freight space.
The trade depots are "close" to the industrial buildings in question.
The trade depots are connected to the industrial buildings via high density streets.
There are no major traffic jams between the two building types.
gaming.stackexchange.com/users/43661/Kauldric
Open the factory map/layer and you'll see yellow and blue delivery trucks moving about (follow them to inspect what they do).
Factories also have yellow bars showing freight available for shipment.
If you have enough commercial buildings plus trade depots/ports there should be very little to no freight built up in the factories.
The trade depot shouldn't be used for storage, if it builds up it means demand is too low for the produce of your industry.
To add demand you can add more commercial buildings or add more freight storage in depot/port/airport.
Depot freight storage functions as a global demand or in other words commercial buildings outside your city.
The more storage you add the more commercial volume of demand from the outside world for your products.
For resources depots function as storage to be traded later,
not so with freight.
With freight depot, storage functions as a way to add commercial demand for industry products, like building more commercial buildings.
Imagine a low wealth city with lots of industry, the workers themselves cannot afford buying that much from local industry, so have to ship to commercial buildings outside their city.
In order to do this demand from the outside world has to be created, which is what you do when you add freight storage in depots/ports.
I get this message about nowhere to ship freight even though there is no freight built up in the factories (no yellow bars) and my advisor says freight is doing great!
So it's a bug, you need to watch the factory layer and build depots or commercial buildings to create demand to soak up the yellow bars.
If you see no yellow bars and no freight built up in depots you're doing great and should see strong profit and demand for workers at your factories.
gaming.stackexchange.com/users/43770/Jonas
I have several industries complaining now.   We need somewhere to ship our freight  Need to ship, going out of business   I have built a Trade Depot and added several Freight Shipping Warehouses. Some of them seems to be used (fills up with boxes), but there's lots of free space.  How does freight shipping work really? What am I missing? How do I stop the complaints?
How do I properly provide places to ship freight?
gaming.stackexchange.com
<simcity-2013>
gaming.stackexchange.com/questions/108153
gaming.stackexchange.com/users/2782/Svish
Airports can be modified to accept freight. You can also add a Trade Depot so the industrial buildings can ship goods to the trade depot. There are plenty ways to tackle this problem. Most of the times, it comes down to planning and building specific zones.
The community provides some solutions to the problem.