Amazon is expanding its less-than-truckload (LTL) freight service in the United States, extending it beyond inbound shipments into its own network to include deliveries to third-party warehouses, distribution centres and retail partners. The service, part of Amazon Supply Chain Services, allows businesses to ship palletized freight by sharing trailer space rather than booking full truckloads. Shipments typically range from one to six pallets, or 150 to 15,000 pounds.