Non-contiguous route
A-3
Alaska Interstate program
Length148.1 mi
Designated1976
States1
Junctionsn/a
About A-3
From Anchorage/Palmer area to Fairbanks area
Interstate A-3 is the shortest of Alaska's four Interstate routes, an unsigned highway of about 148 miles that runs between the Kenai Peninsula and Anchorage. It is made up of the Seward Highway and the Sterling Highway, connecting the Soldotna area on the peninsula northeast to the state's largest city.
The corridor carries no Interstate shields and is known to travelers by its component highway names. It passes through scenic coastal and mountain country along Turnagain Arm and the Kenai Peninsula, and most of the route is built to ordinary two-lane highway standards rather than as a freeway.
A-3 exists to fold the southern Kenai Peninsula highway link into the federal Interstate funding program, providing the main road connection between the recreation and fishing communities of the peninsula and the Anchorage metropolitan area.
State-by-state mileage
| State | Miles |
|---|---|
| Alaska | 148.1 |
| Total | 148.1 |
History
Like the other Alaska Interstate routes, A-3 was designated in 1976 and overlaid on existing highways, allowing those roads to receive Interstate construction and maintenance aid while remaining unsigned and unmarked in the field.
Major cities and places
SoldotnaSewardAnchorage
Did you know
- It is the shortest of the four Alaska Interstate routes.
- It is made up of the Seward Highway and the Sterling Highway.
- It is unsigned and was designated in 1976.
- It connects the Kenai Peninsula to Anchorage.
- Much of the route runs through coastal and mountain terrain.