Goods get from industry (yellow) to your trade depots by road so make sure they are close enough.
Each industrial unit and speciality unit (trade depot, smelting factory) comes with one delivery truck.
You need as many of the truck drivers to get from the speciality industry to the trade depots in a day so the closer it is the less chance the trucks have of getting stuck in traffic.
Make sure your trade depots have freight shipping warehouse lots.
The Industry doesn’t need to be close to the commercial (blue) as the goods get from the trade depots to the commercial buildings virtually, there is no delivery involved.
If you have no trade depot the industry will have to deliver directly to the commercial.