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.
New York State Route 394 New York State Route 394 (NY 394) is a state highway located within Cattaraugus and Chautauqua counties in southwestern New York in the United States. Its western terminus is located on the shore of Lake Erie at an intersection with NY 5 in the Westfield hamlet of Barcelona. The eastern terminus is located at an interchange with the Southern Tier Expressway (Interstate 86 or I-86 and NY 17) at the Coldspring hamlet of Steamburg. From Mayville to Jamestown, NY 394 follows the western edge of Chautauqua Lake. East of Jamestown, the route straddles the Southern Tier Expressway and connects to the highway in four different locations, including at its eastern terminus.