Alabama State Route 959

Interstate 422
Corridor X-1
Route information
Length:	52.5 mi (84.5 km)
Major junctions
West end:	I‑20 / I‑59 / I‑459 / US 11 south of Bessemer
	SR 269 at Sylvan Springs I‑222 to I‑22 / US 78 at Adamsville I‑65 at Morris US 31 at Morris SR 79 at Pinson SR 75 at Pinson
East end:	I‑59 near Argo
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Alabama Highways Interstate US State ← SR 759 SR 1 →

Interstate 422, Corridor X-1, or the Birmingham Northern Beltline is a proposed 52.5-mile-long (84.5 km) northern bypass route around Birmingham, Alabama, through northern and western Jefferson county that is projected to be completed by 2054. Along with the existing I-459, the Northern Beltline would complete the bypass loop of central Birmingham for all Interstate traffic. The project's budget is $5.445 billion; upon completion, the Northern Beltline will be the most expensive road in Alabama's history, and among the most expensive per-mile ever built in the United States.

Current plans for the route have it connecting to I-59 at I-459's current southern terminus in Bessemer, at approximately mile marker 147 to the northeast of Trussville, near Argo. Additional studies are underway to determine the economic feasibility to continue the route from its proposed northeastern terminus southward to I-20 in the Leeds/Moody area in western St. Clair county.

The route has been designated as the Appalachian Regional Commission's high-priority Corridor X-1, unsigned State Route 959, and Interstate 422. The 422 numbering does not conform to normal Interstate guidelines, since it only crosses its "parent" route Interstate 22 in the middle (and will connect only via I-222), while bypass and loop routes are usually numbered by the route connected to at or near each end, which would result in the use of a number such as 659.

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Wikipedia