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GIS Traffic Count Data by County

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The traffic data consists of historical Annual Average Daily Traffic (AADT) and Annual Average Daily Weekday Traffic (AAWDT), percentage single unit and combination trucks in Nad83 ft HARN in both Shapefile and KML file formats. The data is available as either a point layer, which represents the location where the count was done or segment  layer which represent the roadway section corresponding to the count.  The traffic data is updated and published annually in April.

Shape Files
Shape files are a vector data storage format for storing the location, shape, and attributes of geographic features in a Geographic Information System (GIS) environment.

Traffic by Roadway Segment (Segment Layer)
This is a segment layer display, which represents historic traffic data such as AADT, AAWDT & Truck percentages for all state maintained roads.

Traffic by Count Locations (Point Layer)
This is a point layer display, which represents historic traffic data such as AADT & AAWDT & Truck percentages for all state maintained roads.

Keyhole Markup Language (KML)
KML files are XML based language schema for expressing geographic annotation and visualization on internet-based three-dimensional Earth browsers. They can be viewed in GIS data viewers such as ERSI's ARCGIS Explorer or Google Earth.

Traffic by Roadway Segments (Segment Layers)
This is a segment layer display, which represents historic traffic data such as AADT, AAWDT & Truck percentages for all state maintained roads representing the extent of the data.  Once you have the data in the viewer, you can click the segment to obtain the historical traffic data for that location. 

Traffic by Count Locations (Point Layer)
This is a point layer display, which represents historic traffic data such as AADT, AAWDT & Truck percentages for all state maintained roads. Once you have the data in the viewer, you can click the location to obtain the historical traffic data location.

List of data items and their descriptions are defined in Data Description document (PDF, 258 kb).

 

Select a county from the drop-down list below.

 
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