- 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 Real County Road Miles Chart |
|---|
| Calendar Year | Number of All Vehicle Miles | Change from Prior Year | Number of Truck Miles | Change from Prior Year |
|---|
| 2005 | 7,946.602 | N/A | 250.450 | N/A |
| 2006 | 7,946.602 | 0.0% | 250.450 | 0.0% |
| 2007 | 7,946.602 | 0.0% | 254.297 | 1.5% |
| 2008 | 6,786.910 | -14.6% | 215.023 | -15.4% |
| 2009 | 6,788.310 | 0.0% | 215.064 | 0.0% |
| 2010 | 6,763.470 | -0.4% | 216.431 | 0.6% |
| 2011 | 6,763.110 | 0.0% | 216.420 | 0.0% |
| 2012 | 6,766.045 | 0.0% | 216.513 | 0.0% |
| 2013 | 6,396.715 | -5.5% | 204.695 | -5.5% |
| 2014 | 6,765.845 | 5.8% | 216.507 | 5.8% |
| 2015 | 6,765.845 | 0.0% | 216.507 | 0.0% |
| 2016 | 6,765.845 | 0.0% | 216.507 | 0.0% |
| 2017 | 6,854.865 | 1.3% | 301.509 | 39.3% |
| 2018 | 7,010.033 | 2.3% | 294.369 | -2.4% |
| 2019 | 6,484.405 | -7.5% | 181.191 | -38.4% |
| 2020 | 6,406.124 | -1.2% | 178.675 | -1.4% |
| 2021 | 6,327.041 | -1.2% | 176.145 | -1.4% |
| 2022 | 6,628.245 | 4.8% | 265.854 | 50.9% |
| 2023 | 6,446.987 | -2.7% | 267.124 | 0.5% |