Maps

County annual average daily traffic (AADT) maps

City and county traffic maps are updated every four years. We also provide statewide vehicular, truck and interstate traffic maps, as well as interactive statewide traffic maps for all roadways and the turning movement counts for select intersections. Information about the Iowa DOT’s traffic counting process, traffic reports and vehicle classification can be found here.

Please note: The traffic volumes collected during the 2020 collection season were greatly impacted by the COVID-19 pandemic and do not accurately reflect normal traffic conditions for those roadways. As a result, the decreased traffic levels when the traffic samples were taken make the statistical process to extrapolate annual average daily traffic (AADT) volumes problematic. The process uses historical and yearly traffic data from permanent traffic volume collection sites to mathematically adjust the sample traffic data to an AADT. From a planning and engineering perspective it is imperative that the statistical methodology used to determine these AADT volume is sound. Unfortunately, a sample of abnormal traffic data early in the pandemic does not allow a valid statistical representation of AADT to be made. If you have a need for 2020 traffic data and understand the samples were taken during the pandemic with decreased traffic, please use the contact information below to make your request.

For additional traffic information, contact Mark Hansen, 515-239-1990 or Mark.Hansen@iowadot.us.

 
County # County name              
01 ADAIR     2016 2012 2008 2004 2000
02 ADAMS     2016 2012 2008 2004 2000
03 ALLAMAKEE 2021 2017 2013 2009 2005 2001  
04 APPANOOSE   2018 2014 2010 2006 2002 1998
05 AUDUBON     2016 2012 2008 2004 2000
06 BENTON 2021 2017 2013 2009 2005 2001  
07 BLACK HAWK 2021 2017 2014 2013 2009 2005 2001
08 BOONE   2019 2015 2011 2007 2003 1999
09 BREMER 2021 2017 2013 2009 2005 2001  
10 BUCHANAN 2021 2017 2013 2009 2005 2001  
11 BUENA VISTA   2019 2015 2011 2007 2003 1999
12 BUTLER 2021 2017 2013 2009 2005 2001  
13 CALHOUN   2019 2015 2011 2007 2003 1999
14 CARROLL     2016 2012 2008 2004 2000
15 CASS     2016 2012 2008 2004 2000
16 CEDAR   2018 2014 2010 2006 2002 1998
17 CERRO GORDO 2021 2017 2013 2009 2005 2001  
18 CHEROKEE   2019 2015 2011 2007 2003 1999
19 CHICKASAW 2021 2017 2013 2009 2005 2001  
20 CLARKE     2016 2012 2008 2004 2000
21 CLAY   2019 2015 2011 2007 2003 1999
22 CLAYTON 2021 2017 2013 2009 2005 2001  
23 CLINTON   2018 2014 2010 2006 2002 1998
24 CRAWFORD     2016 2012 2008 2004 2000
25 DALLAS     2016 2012 2008 2004 2000
26 DAVIS   2018 2014 2010 2006 2002 1998
27 DECATUR     2016 2012 2008 2004 2000
28 DELAWARE 2021 2017 2013 2009 2005 2001  
29 DES MOINES   2018 2014 2010 2006 2002 1998
30 DICKINSON   2019 2015 2011 2007 2003 1999
31 DUBUQUE 2021 2017 2013 2009 2005 2001  
32 EMMET   2019 2015 2011 2007 2003 1999
33 FAYETTE 2021 2017 2013 2009 2005 2001  
34 FLOYD 2021 2017 2013 2009 2005 2001  
35 FRANKLIN 2021 2017 2013 2009 2005 2001  
36 FREMONT     2016 2012 2008 2004 2000
37 GREENE     2016 2012 2008 2004 2000
38 GRUNDY 2021 2017 2013 2009 2005 2001  
39 GUTHRIE     2016 2012 2008 2004 2000
40 HAMILTON   2019 2015 2011 2007 2003 1999
41 HANCOCK   2019 2015 2011 2007 2003 1999
42 HARDIN 2021 2017 2013 2009 2005 2001  
43 HARRISON     2016 2012 2008 2004 2000
44 HENRY   2018 2014 2010 2006 2002 1998
45 HOWARD 2021 2017 2013 2009 2005 2001  
46 HUMBOLDT   2019 2015 2011 2007 2003 1999
47 IDA   2019 2015 2011 2007 2003 1999
48 IOWA   2018 2014 2010 2006 2002 1998
49 JACKSON 2021 2017 2013 2009 2005 2001  
50 JASPER   2018 2014 2010 2006 2002 1998
51 JEFFERSON   2018 2014 2010 2006 2002 1998
52 JOHNSON   2018 2014 2010 2006 2002 1998
53 JONES 2021 2017 2013 2009 2005 2001  
54 KEOKUK   2018 2014 2010 2006 2002 1998
55 KOSSUTH   2019 2015 2011 2007 2003 1999
56 LEE   2018 2014 2010 2006 2002 1998
57 LINN 2021 2017 2013 2009 2005 2001  
58 LOUISA   2018 2014 2010 2006 2002 1998
59 LUCAS   2018 2014 2010 2006 2002 1998
60 LYON   2019 2015 2011 2007 2003 1999
61 MADISON     2016 2012 2008 2004 2000
62 MAHASKA   2018 2014 2010 2006 2002 1998
63 MARION   2018 2014 2010 2006 2002 1998
64 MARSHALL 2021 2017 2013 2009 2005 2001  
65 MILLS     2016 2012 2008 2004 2000
66 MITCHELL 2021 2017 2013 2009 2005 2001  
67 MONONA     2016 2012 2008 2004 2000
68 MONROE   2018 2014 2010 2006 2002 1998
69 MONTGOMERY     2016 2012 2008 2004 2000
70 MUSCATINE   2018 2014 2010 2006 2002 1998
71 O'BRIEN   2019 2015 2011 2007 2003 1999
72 OSCEOLA   2019 2015 2011 2007 2003 1999
73 PAGE     2016 2012 2008 2004 2000
74 PALO ALTO   2019 2015 2011 2007 2003 1999
75 PLYMOUTH   2019 2015 2011 2007 2003 1999
76 POCAHONTAS   2019 2015 2011 2007 2003 1999
77 POLK COUNTY     2016 2012 2008 2004 2000
77 POLK METRO DETAIL     2016 2012 2008 2004 2000
78 POTTAWATTAMIE     2016 2012 2008 2004 2000
79 POWESHIEK   2018 2014 2010 2006 2002 1998
80 RINGGOLD     2016 2012 2008 2004 2000
81 SAC   2019 2015 2011 2007 2003 1999
82 SCOTT   2018 2014 2010 2006 2002 1998
83 SHELBY     2016 2012 2008 2004 2000
84 SIOUX   2019 2015 2011 2007 2003 1999
85 STORY   2019 2015 2011 2007 2003 1999
86 TAMA 2021 2017 2013 2009 2005 2001  
87 TAYLOR     2016 2012 2008 2004 2000
88 UNION     2016 2012 2008 2004 2000
89 VAN BUREN   2018 2014 2010 2006 2002 1998
90 WAPELLO   2018 2014 2010 2006 2002 1998
91 WARREN     2016 2012 2008 2004 2000
92 WASHINGTON   2018 2014 2010 2006 2002 1998
93 WAYNE   2018 2014 2010 2006 2002 1998
94 WEBSTER   2019 2015 2011 2007 2003 1999
95 WINNEBAGO   2019 2015 2011 2007 2003 1999
96 WINNESHIEK 2021 2017 2013 2009 2005 2001  
97 WOODBURY   2019 2015 2011 2007 2003 1999
98 WORTH 2021 2017 2013 2009 2005 2001  
99 WRIGHT   2019 2015 2011 2007 2003 1999

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