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Long Range Planning - AADT (Annual Average Daily Traffic)

An AADT traffic volume is used throughout the project planning process to provide projected volumes of traffic.  It is based on a 24 hour, two directional count at a given location.  This raw traffic volume is then mathematically adjusted for vehicle type, determined by an axle correction factor.  Then this volume is statistically corrected by a seasonal variation factor that considers time of the year and day of the week.  

To see the traffic history of any count station, please remember the Station Count Location Number and open the site - At the top in the yellow box of the Traffic History site, choose the County Name and enter the Station Number, then click on “Search”.


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2013 AADT by County
2000 AADT Book 2001 AADT Book 2002 AADT Book 2003 AADT Book
2004 AADT Book 2005 AADT Book 2006 AADT Book 2007 AADT Book
2008 AADT Book 2009 AADT Book 2010 AADT Book 2011 AADT Book
2012 AADT Book 2013 AADT Book