The TPO maintains current reports and information about the transportation system in Marion County, which are collected by our partner agencies. Links to external transportation resources and information are also provided
Learn more about why traffic counts are collected, how they are used, and who is responsible for conducting counts in Marion County.
Interactive Traffic Count Map
Locate traffic count data between 2018 - 2022 for count locations throughout Marion County.
2023 Traffic Counts Report
View most recent version of the Traffic Counts Manual published in 2023.
2022 Traffic Counts Report
View the most recent version of the Traffic Count Manual published in 2022.
2021 Traffic Counts Report
View the previous version of the Traffic Count Manual, which includes data between 2016 and 2020.
2020 Traffic Counts Manual
View the previous version of the Traffic Count Manual, which includes data between 2015 and 2019