As of June 27, 2014, the United States Route 15 going through New York State was redesignated as what motorway, running from central Pennsylvania through southern New York?
Interstate 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.
Interstate 990 Interstate 990 (I-990) is an auxiliary Interstate Highway located entirely within the town of Amherst in Erie County, New York, in the United States. It runs in a roughly north–south direction for 6.43 mi through the southwestern and central parts of Amherst from an interchange with I-290 north of Buffalo to an intersection with New York State Route 263 (NY 263, named Millersport Highway) south of Lockport. The highway serves as a connection between Buffalo, the University at Buffalo, and Lockport (via NY 263 and NY 78). Like I-590 in nearby Rochester, I-990 does not physically meet I-90, its parent Interstate Highway; instead, the highway makes the connection by way of a "sibling" highway (I-290). I-990 is the highest numbered Interstate Highway in the United States.