I-99

Interstate 99
I-99 highlighted in red, signed portions with a solid line, unbuilt or unsigned portion with a dotted line
Route information
Length:	98.86 mi (159.10 km)
Existed:	November 6, 1998 (1998-11-06) – present
Southern segment
Length:	85.780 mi (138.050 km)
South end:	I-70 / I-76 / Penna Turnpike / US 220 near Bedford
Major junctions:	PA 56 near Cessna US 22 near Altoona PA 453 in Tyrone PA 350 near Bald Eagle US 322 near State College PA 26 near Pleasant Gap
North end:	US 220 in Bellefonte
Northern segment
Length:	13.08 mi (21.05 km)
South end:	US 15 at the Pennsylvania state line in Lindley
North end:	I-86 / NY 17 / Southern Tier Expressway near Painted Post
Location
States:	Pennsylvania, New York
Counties:	PA: Bedford, Blair, Centre NY: Steuben
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future ← PA 98 PA PA 99 → ← NY 98 NY NY 99 →

Interstate 99 (I-99) is an Interstate Highway with two segments: one located in central Pennsylvania, and the other in southern New York in the United States. The southern terminus of the route is at exit 146 of the Pennsylvania Turnpike (I-70 and 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 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. I-99 passes through Altoona and State College—the latter home to Pennsylvania State University—and is entirely concurrent to US 220, within Pennsylvania. Long-term plans call for I-99 to be extended southward along the US 220 corridor to an interchange with I-68 in Cumberland, Maryland.