Logistics and transportation make up a crucial sector of the U.S. economy. Millions of trucks, rail cars, and vessels move goods across the country. The shipping industry is changing rapidly however, in response to the changing needs of shippers and consumers. Less than truckload or LTL shipments now make up a significant portion of the industry. Changing trends are also seen in the pharmaceuticals transportation industry, with innovations such as cold shipping and real time tracking to maintain the quality and integrity of shipments.