Traffic Census Program

TRAFFIC COUNTS (a.k.a. Traffic Volumes) are for the State Highway System only (in various formats).

Highways are signed as Interstate, California State Route, or United States Route. See examples below.


Traffic count information for city and county streets may be found at the following links. Click HERE for city traffic volume information. County traffic volume information is available at the County Public Works Department, or the Community Development Office in the area where the street is located.


Caltrans Traffic Counts are summarized annually into four categories:

Traffic Volumes: Annual Average Daily Traffic (AADT)

For ALL vehicles on CA State Highways.

by Webpage:  2016  |  2015  |  2014  |  2013  |  2012  |  2011


by PDF:  2016201520142013
**
2012**2011**2010**2009
200820072006 | 20052004
2003
2002200120001999

1998
19971996199519941993


by Excel:  2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2008
2007
| 2006 | 2005 | 2004 | 2003 | 2002 | 2001

**An error was reported on the Traffic Volumes on California State Highways Years 2009, 2010, 2011, and 2012. Located in the Preface (Page ii), Traffic Trend on Year 2008 over 2007 reads +3.5%. Instead, this number should be reported as -3.5%.

Truck Traffic: Annual Average Daily Truck Traffic

For truck traffic on CA State Highways.

by PDF: 2016 | 2015 | 2014 | 20132012201120102009
2008
200720062005200420032002


by Excel: 2016201520142013
2012
201120102009
2008
20072006 | 20052004
2003
20022001
20001998199519941993

Ramp Volumes

For ramp volumes on California State Freeways, by Caltrans District.

Legend of District County Names (JPG)


by PDF:
District 1:  
2016  |  2015  |  2014  |  2013  |  2012
District 2:  
2016  |  2015  |  2014  |  2013  |  2012
District 3:  
2016  |  2015  |  2014  |  2013  |  2012
District 4:  
2016  |  2015  |  2014  |  2013  |  2012
District 5:  
2016  |  2015  |  2014  |  2013  |  2012
District 6:  
2016  |  2015  |  2014  |  2013  |  2012
District 7:   
2016  |  2015  |  2014  |  2013  |  2012
District 8:  
2016  |  2015  |  2014  |  2013  |  2012
District 9:   
2016  |  2015  |  2014  |  2013  |  2012
District 10:
2016  |  2015  |  2014  |  2013  |  2012
District 11:
2016  |  2015  |  2014  |  2013  |  2012
District 12:
2016  |  2015  |  2014  |  2013  |  2012


by Excel:
District 1:   2016
District 2:  
2016
District 3:  
2016
District 4:  
2016
District 5:  
2016
District 6:  
2016
District 7:   
2016
District 8:  
2016
District 9:   
2016
District 10:
2016
District 11:
2016
District 12:
2016

Peak Hour Volume Data

Hourly volume relationships and traffic monitoring sites on the State Highway System.
Morning (AM) and evening (PM) peak periods are expressed as a percentage of Annual Average Daily Traffic (AADT).

Peak Hour Definitions K and D Factors


by Year:  2016 | 201520142013201220112010

For questions regarding AADT reports, Ramp Volumes, or the Peak Hour Volume Data Reports above, please contact: Cindy.Pribyl@dot.ca.gov, or (916) 654-4578.

For questions regarding Truck AADT, please contact Diana Tham: diana.t.tham@dot.ca.gov, or (916) 654-4707.

Traffic Volumes and Truck AADT are also available for a nominal fee in hard copy format from Caltrans Publications office at (916) 263-0822. To order on-line, or by mail or fax, visit Caltrans Publications.

For AADT GIS data, visit the GIS Data Library, Highway Section on the DRISI website.