The systems and methods described herein relate to managing transportation of loads of items within a retail supply chain. A unified load tracking system aggregates information from multiple supply chain computing systems for presentation on a user interface accessible by multiple users. One user interface provide access to a multitude of information that is interconnected by a common, unique identifier for each movement of a load between an origin and destination. A load board is also provided which automates the spot market auction process and load tender process between carriers and a retail enterprise transportation management system.