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:

interstate route shield   state route shield   US route shield

Traffic count information for city and county streets may be found at the city Traffic Engineering or 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 California State Highways

All files are .XLSX

2020-AADT  2019-AADT 2018-AADT  2017-AADT  2016-AADT 
2015-AADT 2014-AADT  2013-AADT    

by Webpage:  2017

Truck Traffic: Annual Average Daily Truck Traffic

For truck traffic on California State Highways

All files are .XLSX

2020-AADT Truck 2019-AADT Truck  2018-AADT Truck 2017-AADT Truck  2016-AADT Truck
2015-AADT Truck  2014-AADT Truck 2013-AADT Truck    
Ramp Volumes

For ramp volumes on California State Freeways, by Caltrans District

2020-2017 files are .XLSX and 2016 files are .PDF

 District 1  District 2  District 3 District 4  District 5   District 6
2020-D1 2020-D2 2020-D3 2020-D4 2020-D5 2020-D6
2019-D1 2019-D2  2019-D3 2019-D4 2019-D5 2019-D6
2018-D1 2018-D2  2018-D3 2018-D4 2018-D5 2018-D6
2017-D1 2017-D2  2017-D3 2017-D4 2017-D5 2017-D6
2016-D1 2016-D2  2016-D3  2016-D4 2016-D5 2016-D6
District 7  District 8 District 9  District 10  District 11  District 12 
2020-D7 2020-D8  2020-D9 2020-D10 2020-D11 2020-D12
2019-D7 2019-D8 2019-D9 2019-D10 2019-D11 2019-D12
2018-D7 2018-D8 2018-D9 2018-D10 2018-D11 2018-D12
2017-D7 2017-D8 2017-D9 2017-D10 2017-D11  2017-D12
2016-D7 2016-D8 2016-D9  2016-D10 2016-D11 2016-D12

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 AADT

All files are .XLSX

2020 2019  2018 
2017  2016
2015 2014      


For questions regarding AADT reports, Ramp Volumes, or the Peak Hour Volume Data Reports above, please contact Hasib Mohabbat.

For AADT GIS data, visit the Caltrans GIS Data webpage.