is the overall vertical structure of any particular Segment of the KDOT Highway Network that is derived from an analysis of Actions to generate the structure (or Sandwich). Note that Layer Data can be compared to cores to see if layers or Action History are missing. Both the Actions taken to generate the layers and the materials that remain as a result of the layers can be displayed in a pavement sandwich diagram to help users understand what the structure is at the location and what Actions might be feasible. (See also Pavement Sandwich)