4-Lane Divided Highways in the United State Outside the Interstate System

Discover America's hidden road trip gems with our exclusive map, charting every non-interstate 4-lane highway in the USA.

Google Maps, Apple Maps and Waze don’t distinguish between two-lane roads and four-lane roads, our map highlights these key routes for road trippers, RV campers, and adventurers. Click on the map above.

Map data was sourced from OpenStreetMap, available under the Open Database License. This project also utilizes QGIS, an open-source geographic information system licensed under the GNU General Public License.