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?
U.S. Route 15 in New York U.S. Route 15 (US 15) is a part of the U.S. Highway System that runs from Walterboro, South Carolina, to Painted Post, New York. In the U.S. state of New York, US 15 extends 12.68 mi through the Southern Tier from the Pennsylvania state line at Lindley north to an interchange with the Southern Tier Expressway (Interstate 86 and New York State Route 17) just outside Painted Post. US 15 originally continued north to Rochester before being truncated to its present northern terminus. All of US 15 in New York was designated as I-99 on June 27, 2014.
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.