The primary storage utility for the majority of the information that is collected on South Dakotas highway system is the Roadway Environment Subsystem (RES). Eight key files are contained in the RES system:
Dynaflect, Roughometer, and Pavement Friction Inventory
Roadway Features Inventory
Railroad Crossing Inventory
Maintenance Cost Inventory
A minimum of ten other files exist that are associated to RES with varying location referencing systems. The majority of RES data is updated by personnel from Data Inventory and Operations Support. Planning and Programs is the primary user of the data but it is difficult to determine the total number of users of the data. The list of users is expected to increase as the ease of access to the data increases.