Traffic counts

TCMap (Traffic Count Map)

TC Interactive mapThe Wisconsin Department of Transportation (WisDOT) provides traffic counts via a new interactive map that allows you to view counts anywhere in the state. This new map, called TCMap, replaces a Google map that was in use since 2012. TCMap enables users to search, pan and zoom to areas throughout the state to view AADTs, both continuous and short duration. The data included will provide users the most recent volume count as well as historical data if available.

Traffic counts are reported as the number of vehicles expected to pass a given location on an average day of the year. This value is called the "annual average daily traffic" or AADT and is represented on traffic count or traffic volume maps. The AADT is based on a short duration traffic count, usually 48 hours, taken at the location. This count is then adjusted for the variation in traffic volume throughout the year and the average number of axles per vehicle. Short duration counts are collected over three, six, or ten-year cycles at more than 26,000 rural and urban locations throughout the state.

Historical traffic counts

Before the creation of the interactive traffic count map, data from 2000 to 2010 was made available on county and municipality PDFs. This same information is now available in the interactive map. Contact the DOT Traffic Data Unit if you need a PDF that was available on the former WisDOT website.

Continuous count data

WisDOT collects continuous count data from 318 permanent data collection locations primarily located on the State Trunk Highway System. Data at continuous count sites are scheduled to be collected in hourly intervals each day of the year.

Traffic forecasting

Traffic forecasting is an important component of WisDOT planning, design and operations. It transforms a wide array of traffic, demographic and economic data into information essential to engineers, intercity and urban planners, project programmers and policy makers.