It has been studied, but I don't know if the information is on the Web.  The federal and state DOTs have studied it, as part of their planning processes.  
I'd imagine the present level of product availability probably requires a lot more intermediate storage and transfer facilities.
Just-in-time delivery, "rolling warehouses," etc., are distribution systems designed around cheap energy.  (Wal-Mart has perfected this system.) It works because it's cheaper to send a truck out every day than to rent more storage space on-site.  As fuel prices rise, I expect that to change.