Hello, I am always curious how packages are routed and so I enjoy following the tracking information. Historically, a package sent from the Northeast part of the country to Arizona would end up at the large hub in Hodgkins, IL and then get sent non stop to Phoenix, I suspect by rail. I am tracking a package now that departed Massachusetts and about a day and a half later, the next entry was arriving at the UPS facility in Addison, IL, north of Hodgkins, but still in the Chicago area. I am curious to why it went to Addison rather than the usual routine of going to the Hodgkins hub. Is Addison now a major distribution hub? I did read in another post that Addison was closed for a couple of years and underwent major upgrades. I guess a more general question is what is the difference in the two hubs? What determines where the package goes between the two facilities? Is Hodgkins at capacity and Addison handles the overflow? The package as best I can tell is going normal UPS ground (no USPS) and is about a 16 inch long box weighing 8.6 lb. Thanks for any general information.