Annual Average Daily Traffic (AADT)
Annual Average Daily Traffic (AADT) volume is used throughout the project planning process to provide projected future traffic volumes. It is based on a 24-hour, two-directional count at a given location. The raw traffic data is mathematically adjusted for vehicle type, determined by an axle correction factor. The data is then statistically corrected by a seasonal variation factor that considers time of year and day of the week.
To view traffic history by Station County Location Number, go to https://www.arcgis.com/apps/webappviewer/index.html?id=075987cdae37474b88fa400d65681354. Once on the traffic history site, select the county name (yellow box at top of screen), enter the station number, and click “Search.”
To view traffic history by county and roadway, select the yearly report from the books below. (Adobe Acrobat Reader required)