| Interstate 581 | ||||
|---|---|---|---|---|
|  | ||||
| Route information | ||||
| Maintained by VDOT | ||||
| Length: | 6.35 mi (10.22 km) | |||
| Existed: | late 1950s – present | |||
| Major junctions | ||||
| South end: |   US 220 / SR 24 in Roanoke | |||
| North end: |   I‑81 / US 220 near Hollins | |||
| Highway system | ||||
| 
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Interstate 581 (I-581) is a spur off Interstate 81 into Roanoke, Virginia, United States, completely overlapping U.S. Route 220. It is proposed to be overtaken by Interstate 73. Future I-73 Corridor Signs are marked on I-581; one on the southbound side just after Exit 2.
The I-581 designation ends at the Elm Avenue (State Route 24) interchange in downtown Roanoke, Virginia, where US 220 continues south as the Roy L. Webber Expressway. I-581 was constructed as a six lane highway for its entire length and has not been widened in its history.
Many of I-581's exits are cloverleaf interchanges, which results in weaving. The northern terminus has short merge areas with I-81, particularly the left-lane southbound merge.
Roanoke Regional Airport, Valley View Mall, and the Roanoke Civic Center are all located adjacent to I-581. The Hershberger Road (State Route 101) exit has become a focus of development. In addition to Valley View, two large hotels were constructed in the early 1980s with another group of hotels being constructed from the mid-1990s through the present. In 2002, local CBS affiliate WDBJ constructed its new facility, designed to broadcast in HDTV, on Hershberger Road near I-581.