- 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 King County Road Miles Chart |
|---|
| Calendar Year | Number of All Vehicle Miles | Change from Prior Year | Number of Truck Miles | Change from Prior Year |
|---|
| 2005 | 16,679.185 | N/A | 533.734 | N/A |
| 2006 | 16,679.185 | 0.0% | 533.734 | 0.0% |
| 2007 | 10,485.041 | -37.1% | 335.522 | -37.1% |
| 2008 | 8,084.302 | -22.9% | 258.698 | -22.9% |
| 2009 | 8,097.607 | 0.2% | 259.123 | 0.2% |
| 2010 | 6,505.018 | -19.7% | 208.161 | -19.7% |
| 2011 | 8,084.370 | 24.3% | 258.700 | 24.3% |
| 2012 | 9,165.219 | 13.4% | 293.287 | 13.4% |
| 2013 | 9,165.219 | 0.0% | 293.287 | 0.0% |
| 2014 | 9,165.219 | 0.0% | 293.287 | 0.0% |
| 2015 | 9,165.219 | 0.0% | 293.287 | 0.0% |
| 2016 | 9,165.219 | 0.0% | 293.287 | 0.0% |
| 2017 | 4,966.203 | -45.8% | 136.716 | -53.4% |
| 2018 | 5,785.410 | 16.5% | 158.112 | 15.6% |
| 2019 | 5,784.120 | 0.0% | 158.069 | 0.0% |
| 2020 | 5,916.930 | 2.3% | 166.425 | 5.3% |
| 2021 | 5,916.996 | 0.0% | 166.426 | 0.0% |
| 2022 | 2,316.951 | -60.8% | 2.570 | -98.5% |