This blog post was updated on March 25, 2019. I find myself googling for this data once a month or so. I just can’t seem to remember where to find it on the Federal Highway Administration’s website. Below are states by total 2017 lane miles–which is the most recent dataset available today and is dated August 2018.
Road Miles by State: Sorted from Most to Least
|STATE||TOTAL LANE MILES|
|District of Columbia||3,454|
|Source: U.S. Department of Transportation Federal Highway Administration. Office of Highway Policy Information. Highway Statistics Series. Functional System Lane-Length – 2017. Released August 23, 2018. You can download an Excel or PDF version of this data here.|
Pie Graph Showing 2017 Lane Miles by State
And just for fun, here’s a pie graph of this table.
Helpful Links with Road Miles by State data
If you need historic data like lane miles for 1980 to 2007, check out Functional System Data; Estimated Lane – Length page. If you need Function System data for 2008 (i.e. interstates, freeways, arterial, collectors and local), check out FHWA’s Functional System Lane-Length – 2008 Lane-Miles page.
And below are links to FHWA’s Functional System Lane-Length by year. You can download PDF and Excel versions of the data on these pages.
- 2009 Lane Miles
- 2010 Lane Miles
- 2011 Lane Miles
- 2012 Lane Miles
- 2013 Lane Miles
- 2014 Lane Miles
- 2015 Lane Miles
- 2016 Lane Miles
- 2017 Lane Miles
Got questions? Email us.