Well, another advice is to make the caravan in each village of his own and send it in the reference settlement (hub), it's better than a bunch of people from the settlement hub to spend.
Yes, pipboy in the review workshops, incorrect information almost always, it's trouble. I the caravans for seccure connecter, I put down a 4 post caravan (construction of such caravans in it connectats visual), missing, no traffic jams))) in General, this construction is very helpful, before, for example, in the castle brahmin crowd, now do not go - the posts are on the outside. Tube lines is not important at all, the line runs independently of the clusters of caravans in the settlements. If you construct a Trade Caravan Post in one of your settlements, youll find that it is frequently.
Will write in red that there is not enough resources in the village, but the mood will not fall.
If in any settlement will not have enough food and water, assuming the surplus in other connected settlements, they all will be OK And it will happen because the excess water and food stacked up in the workshop in inventory, and he, as we remember, General. They are not just the inventory total, and with all the consequences.