Annual Average Daily Traffic estimates (AADTs) are derived from three primary sources of data: permanent traffic recorders, portable traffic recorders and Manual traffic classification counts. AADTs are multiplied by road length to calculate Vehicle Miles Traveled.
2019 Vehicle Miles Book - Excel format or PDF format
The Interactive Transportation System Map is a new online offering from WYDOT that provides traffic count data and other information about the state road system. The map uses GIS technology to allow users to choose from one or more data layers, the last being Traffic Counts (2015).