![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/1/13/I-99.svg/640px-I-99.svg.png&w=640&q=50)
Interstate 99
Interstate Highway in Pennsylvania and New York / From Wikipedia, the free encyclopedia
Interstate 99 (I-99) is an interstate highway in the United States with two segments: one located in central Pennsylvania and the other in southern New York.[3] The southern terminus of the route is near exit 146 of the Pennsylvania Turnpike (I-70/I-76) north of Bedford, where the road continues south as U.S. Route 220 (US 220). The northern terminus of the Pennsylvania segment is at an at-grade intersection with Musser Lane just before reaching I-80 near Bellefonte. The New York segment follows US 15 from the Pennsylvania–New York border to an interchange with I-86 in Corning. Within Pennsylvania, I-99 passes through Altoona and State College—the latter home to the Pennsylvania State University—and is entirely concurrent with US 220. Long-term plans call for the two segments of I-99 to be connected using portions of I-80, US 220, and US 15 through Pennsylvania.
I-99 highlighted in red and Future I-99 in blue | |||||||
Route information | |||||||
Length | 98.34 mi[1] (158.26 km) | ||||||
Existed | 1998 (1998)[2]–present | ||||||
NHS | Entire route | ||||||
Pennsylvania | |||||||
Length | 85.74 mi[1] (137.99 km) | ||||||
South end |
| ||||||
Major intersections |
| ||||||
North end | ![]() ![]() | ||||||
New York | |||||||
Length | 12.60 mi[1] (20.28 km) | ||||||
South end | ![]() | ||||||
Major intersections | |||||||
North end | ![]() ![]() ![]() ![]() | ||||||
Location | |||||||
Country | United States | ||||||
States | Pennsylvania, New York | ||||||
Counties | PA: Bedford, Blair, Centre NY: Steuben | ||||||
Highway system | |||||||
|
Unlike most interstate highway numbers, which were assigned by the American Association of State Highway and Transportation Officials (AASHTO) to fit into a grid, I-99's number was written into Section 332 of the National Highway System Designation Act of 1995 by Bud Shuster, then-chair of the US House Committee on Transportation and Infrastructure, the bill's sponsor, and the representative of the district through which the highway runs. I-99 violates the AASHTO numbering convention associated with interstate highways, as it should lie to the east of I-97 but instead lies east of I-79 and west of I-81.