- 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 Delta County Road Miles Chart |
|---|
| Calendar Year | Number of All Vehicle Miles | Change from Prior Year | Number of Truck Miles | Change from Prior Year |
|---|
| 2005 | 5,272.006 | N/A | 168.703 | N/A |
| 2006 | 5,272.006 | 0.0% | 168.703 | 0.0% |
| 2007 | 5,268.996 | -0.1% | 168.608 | -0.1% |
| 2008 | 3,470.710 | -34.1% | 111.059 | -34.1% |
| 2009 | 3,470.450 | 0.0% | 111.054 | 0.0% |
| 2010 | 3,453.870 | -0.5% | 110.524 | -0.5% |
| 2011 | 3,453.870 | 0.0% | 110.524 | 0.0% |
| 2012 | 3,453.870 | 0.0% | 110.524 | 0.0% |
| 2013 | 3,923.393 | 13.6% | 125.549 | 13.6% |
| 2014 | 3,453.870 | -12.0% | 110.524 | -12.0% |
| 2015 | 3,453.870 | 0.0% | 110.524 | 0.0% |
| 2016 | 3,453.870 | 0.0% | 110.524 | 0.0% |
| 2017 | 3,453.770 | 0.0% | 39.422 | -64.3% |
| 2018 | 3,610.827 | 4.5% | 23.934 | -39.3% |
| 2019 | 3,580.498 | -0.8% | 22.728 | -5.0% |
| 2020 | 3,703.944 | 3.4% | 22.728 | 0.0% |
| 2021 | 3,731.793 | 0.8% | 22.728 | 0.0% |
| 2022 | 3,959.850 | 6.1% | 22.842 | 0.5% |