Interstate 3, also known as the Trans-Heaven Highway, is a major interstate that serves central and southwestern portions of Heaven, including the states of Central Heaven and Western Heaven. Notable cities and settlements adjacent to or passed through by Interstate 3 include Cliffside, Spawnton, Mainton, and Leethill. The western terminus is currently just west of Interstate 503 at Leethill Airport, and the eastern terminus is at the start of Route 40 at the border of Cliffside.
|Junction||Distance (mi)||Distance (km)||Cumulative distance (mi)||Cumulative distance (km)||Seconds traveled||Seconds traveled (cumulative)|
| Route 40|
|Spawnton Truck Stop||26|
|Business Spur 3||38|
|North Lake Rd||51|