- 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 Williamson County Road Miles Chart |
|---|
| Calendar Year | Number of All Vehicle Miles | Change from Prior Year | Number of Truck Miles | Change from Prior Year |
|---|
| 2005 | 635,656.799 | N/A | 3.297 | N/A |
| 2006 | 635,756.674 | 0.0% | 3.297 | 0.0% |
| 2007 | 606,639.649 | -4.6% | 3.297 | 0.0% |
| 2008 | 485,880.391 | -19.9% | 133.819 | 3,958.8% |
| 2009 | 482,562.581 | -0.7% | 147.630 | 10.3% |
| 2010 | 503,231.910 | 4.3% | 16,103.421 | 10,808.0% |
| 2011 | 498,090.764 | -1.0% | 15,935.106 | -1.0% |
| 2012 | 495,722.619 | -0.5% | 15,842.046 | -0.6% |
| 2013 | 495,210.139 | -0.1% | 15,846.724 | 0.0% |
| 2014 | 494,259.209 | -0.2% | 15,816.295 | -0.2% |
| 2015 | 739,020.151 | 49.5% | 24,257.902 | 53.4% |
| 2016 | 748,530.373 | 1.3% | 24,549.026 | 1.2% |
| 2017 | 829,279.617 | 10.8% | 44,442.568 | 81.0% |
| 2018 | 910,721.624 | 9.8% | 43,418.814 | -2.3% |
| 2019 | 983,746.555 | 8.0% | 50,192.591 | 15.6% |
| 2020 | 935,154.403 | -4.9% | 59,938.845 | 19.4% |
| 2021 | 916,789.700 | -2.0% | 40,665.275 | -32.2% |
| 2022 | 907,881.114 | -1.0% | 45,387.281 | 11.6% |