Use the Route ID Builder to generate a valid WVDOT Route ID. The WVDOT Route ID has 6 components: County, Sign System, Route Number, Subroute Number, Supplemental Code, and Direction. The Route ID Builder is designed to be used from the top down, as you select a value for a component, the next field is filtered to show only the valid responses for the preceding components. For example, when you select a county, only the sign systems that are in that specific county are shown in the dropdown. Select a sign system, and only route numbers in that county with that sign system are displayed.