Today much of the focus is on last-mile deliveries and first-mile services that link vendors and fulfillment centers. The middle mile has received such little attention that it is often referred to as the ‘invisible mile.” But it is where much of the work that makes logistics run – consolidations and de-consolidations – occurs. It encompasses a complex web of distribution centers used to shift products throughout the country. The middle mile is also where much of the delivery distance is covered.