Question: 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?
Context: 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. Pennsylvania Route 14 (PA 14) is a Pennsylvania highway that runs for 52 mi .  It runs from U.S. Route 15 in Trout Run, Pennsylvania to the New York-Pennsylvania border at Fassett, Pennsylvania, co-signed with U.S. Route 6 for a short distance in Troy.  The highway continues in New York as New York State Route 14. New York State Route 120A (NY 120A) is a state highway in southern Westchester County, New York, in the United States.  It serves as an alternate route to the southern half of NY 120 running along the New York–Connecticut state line.  The southern terminus of route is at NY 120 in Harrison.  Its northern terminus is at NY 120 in North Castle.  Most of the 8.55 mi route straddles the New York–Connecticut state line, and part of the route is physically located in Connecticut.  However, this part of the highway is not recognized by Connecticut as "Route 120A", and is considered to be part of NY 120A by the New York State Department of Transportation (NYSDOT). Pennsylvania Route 554 (PA 554) is a highway which runs for 8 miles (14 km) generally north–south in Lycoming County in north central Pennsylvania in the United States.  Its southern terminus is at Pennsylvania Route 44 just north of the unincorporated village of Elimsport in Washington Township and its northern terminus is at U.S. Route 15 in South Williamsport. 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. New York State Route 351 (NY 351) is a north–south state highway in central Rensselaer County, New York, in the United States.  It extends for 8.16 mi from an intersection with NY 43 in the Sand Lake hamlet of West Sand Lake to a junction with NY 2 in the Brunswick hamlet of Cropseyville.  The portion of NY 351 north of the hamlet of Poestenkill was originally designated as New York State Route 153 in the 1930s.  This designation was removed in the 1940s, and the West Sand Lake–Cropseyville roadway became County Route 77 (CR 77) sometime afterward.  On April 1, 1980, all of CR 77 was transferred to the state of New York, at which time it was redesignated as NY 351 by the New York State Department of Transportation (NYSDOT). New York State Route 15 (NY 15) is a north–south state highway located in western New York in the United States.  The southern terminus of the route is officially at Interstate 390 (I-390) exit 3 south of the village of Wayland, although some signage indicating that NY 15 continues south to the northern terminus of U.S. Route 15 (US 15) in Painted Post still exists.  The northern terminus of NY 15 is at an intersection with NY 31 in downtown Rochester.  Outside of Monroe County, NY 15 is a rural two-lane highway.  In the Rochester suburbs of Henrietta and Brighton, however, NY 15 is a major commercial strip, and the section in Rochester is a two-to-four lane street that serves commercial and residential areas. New York State Route 27 (NY 27) is an east–west 120.58 mi long state highway extending from Interstate 278 (I-278) in the New York City borough of Brooklyn to Montauk Point State Park on Long Island, New York, in the United States.  Its two most prominent components are Sunrise Highway and Montauk Highway, the latter of which includes the Montauk Point State Parkway.  East of the interchange with the Heckscher State Parkway in Islip Terrace, NY 27 acts as the primary east–west highway on southern Long Island.  The entire route in Suffolk, Nassau, and Queens counties was designated by the New York State Senate as the POW/MIA Memorial Highway.  Every town on the South Shore is accessible through Sunrise Highway.  The service roads that parallel the highway from Farmingdale to Brookhaven are officially designated, but not signed, as New York State Route 906C and New York State Route 906D. Route 94 is a state highway in the northwestern part of the New Jersey, United States.  It runs 45.94 mi from the Portland–Columbia Toll Bridge over the Delaware River in Knowlton Township, Warren County, where it connects to Pennsylvania Route 611 (PA 611), northeast to the New York state line in Vernon Township, Sussex County.  At the New York border, New York State Route 94 (NY 94) continues to Newburgh, New York.  Route 94 is mostly a two-lane undivided road that runs through mountain and valley areas of Warren and Sussex counties, serving Columbia, Blairstown, Newton, and Hamburg.  The route intersects several roads, including U.S. Route 46 (US 46) and Interstate 80 (I-80) in Knowlton Township, US 206 in Newton, Route 15 in Lafayette Township, and Route 23 in Hamburg. Pennsylvania Route 35 (PA 35) is a 70.4 mi state highway located in central Pennsylvania.  The southern terminus of the route is at U.S. Route 522 near Shade Gap.  The northern terminus is at U.S. Route 11 and U.S. Route 15 in Selinsgrove.
Answer: Interstate 99