- Data only includes miles travelled on county roads. It does not include miles travelled on city, state or federal roads and highways.
- Lack of a visible bar can occur when the number is so small the result is a bar less than one pixel in height.
| Data for the Marion County Road Miles Chart |
|---|
| Calendar Year | Number of All Vehicle Miles | Change from Prior Year | Number of Truck Miles | Change from Prior Year |
|---|
| 2005 | 41,113.920 | N/A | 1,315.649 | N/A |
| 2006 | 41,667.015 | 1.3% | 1,333.350 | 1.3% |
| 2007 | 41,241.249 | -1.0% | 1,319.721 | -1.0% |
| 2008 | 41,376.249 | 0.3% | 1,324.044 | 0.3% |
| 2009 | 41,234.854 | -0.3% | 1,319.515 | -0.3% |
| 2010 | 40,458.592 | -1.9% | 1,294.675 | -1.9% |
| 2011 | 40,668.406 | 0.5% | 1,301.389 | 0.5% |
| 2012 | 40,668.406 | 0.0% | 1,301.389 | 0.0% |
| 2013 | 40,356.131 | -0.8% | 1,291.396 | -0.8% |
| 2014 | 40,474.861 | 0.3% | 1,295.196 | 0.3% |
| 2015 | 40,474.861 | 0.0% | 1,295.196 | 0.0% |
| 2016 | 40,474.861 | 0.0% | 1,295.196 | 0.0% |
| 2017 | 41,750.939 | 3.2% | 1,374.382 | 6.1% |
| 2018 | 26,555.071 | -36.4% | 1,011.583 | -26.4% |
| 2019 | 26,515.621 | -0.1% | 750.522 | -25.8% |
| 2020 | 29,477.321 | 11.2% | 1,038.239 | 38.3% |
| 2021 | 29,783.773 | 1.0% | 1,031.443 | -0.7% |
| 2022 | 29,542.644 | -0.8% | 1,218.167 | 18.1% |