I like how you are posting actual tactics and solutions to the challenges of the game!
What are your exact difficulty settings? Only saw you are not using return trips. How about citizen demands and traffic or any other modifiers?
If you are playing on hard traffic difficulty then your traffic calculations are correct. If you are on any other difficulty then I think they may contain errors (although I didn’t check in detail). The reason is that trucks can transport more than 1 good at once, but this is actually different for some goods. There is something called Order Size. So to make sure your numbers are correct, you not only have to click the habitats and the factories (or production panel) but also the trucks of each product type.
Maybe I’ll post my strategy for hard + return trips that I used in my most recent attempt.