Question: Interstate 376 (I-376) is a major auxiliary route of the Interstate Highway System in the U.S. state of Pennsylvania, located within the Allegheny Plateau, the route serves Pittsburgh, Pennsylvania and its surrounding areas, and is the main access road to Pittsburgh International Airport (PIT), in which country?
Context: Interstate 279 (abbreviated I-279) is a north–south Interstate Highway spur that lies entirely within Allegheny County, Pennsylvania.  Its southern end is at Interstate 376 at the Fort Pitt Bridge in Pittsburgh, and the north end is in Franklin Park at Interstate 79.  It primarily serves at the main access route between Pittsburgh and its northern suburbs. Interstate 376 (I-376) is a major auxiliary route of the Interstate Highway System in the U.S. state of Pennsylvania, located within the Allegheny Plateau.  It runs from I-80 near Sharon south and east to a junction with the Pennsylvania Turnpike (I-76, its parent) in Monroeville, after having crossed the Turnpike at an interchange earlier in its route.  The route serves Pittsburgh, Pennsylvania and its surrounding areas, and is the main access road to Pittsburgh International Airport (PIT).  Within Allegheny County, the route runs along the majority of the Penn-Lincoln Parkway, known locally as the Parkway West and the Parkway East.  The route is also known by several other names in various jurisdictions.  It is currently the fifth-longest auxiliary Interstate route in the system, and second only to I-476 within Pennsylvania. Interstate 110 (I-110) is a 6.341 mi auxiliary route of the Interstate Highway System in Pensacola, Florida, running north from U.S. Highway 98 to Interstate 10.  I-110 carries the hidden Florida Department of Transportation designation of State Road 8A.  The easternmost auxiliary route of I-10, it is also known as the Reubin O'Donovan Askew Parkway, in honor of the former governor of Florida who was also from Pensacola. Interstate 695 (I-695) is a 51.46 mi full beltway Interstate Highway extending around Baltimore, Maryland, United States.  I-695 is officially designated the McKeldin Beltway, but is colloquially referred to as either the Baltimore Beltway or 695.  The route is an auxiliary route of I-95, intersecting that route southwest of Baltimore near Arbutus and northeast of the city near White Marsh.  It also intersects other major roads radiating from the Baltimore area, including I-97 near Glen Burnie, the Baltimore–Washington Parkway (Maryland Route 295, MD 295) near Linthicum, I-70 near Woodlawn, I-795 near Pikesville, and I-83 in the Timonium area.  The 19.37 mi portion of the Baltimore Beltway between I-95 northeast of Baltimore and I-97 south of Baltimore is officially MD 695, and is not part of the Interstate Highway System, but is signed as I-695.  This section of the route includes the Francis Scott Key Bridge that crosses over the Patapsco River.  The bridge and its approaches are maintained by the Maryland Transportation Authority (MdTA) while the remainder of the Baltimore Beltway is maintained by the Maryland State Highway Administration (MDSHA). Pittsburgh International Airport (IATA: PIT, ICAO: KPIT, FAA LID: PIT) , formerly Greater Pittsburgh International Airport, is a civil–military international airport in the suburbs of the United States' city of Pittsburgh, Pennsylvania.  It is located in Findlay and Moon townships of Allegheny County, about 20 mi west of downtown Pittsburgh. Tennessee State Route 223 is a state route in Madison County, Tennessee.  It runs from SR 138 near Mercer to Interstate 40, just west of Jackson.  The highway is the main access road for McKellar-Sipes Regional Airport, the regional airport for Jackson and the surrounding areas.  Also, TDOT's Region 4 office is located at the highway's interchange with I-40.  The portion from the southern terminus to the airport is a rural 2 lane highway and the part from the airport to the northern terminus is a 4-lane divided highway and runs through a mixed rural/industrial area. Pennsylvania Route 8 (PA 8) is a major 148.6 mi route in western Pennsylvania.  Officially, PA 8 is named the William Flinn Highway.  Its southern terminus is at Interstate 376, U.S. Route 22, and U.S. Route 30 (I-376/US 22/US 30) in Pittsburgh.  Its northern terminus is US 20 in Erie. Pennsylvania Route 60 (PA 60) is a state highway located in the western suburbs of Pittsburgh, Pennsylvania, in the United States.  Although the route follows a mostly east–west alignment, it is signed as a north–south highway.  The southern terminus of the route is at a pseudo-interchange with U.S. Route 19 (US 19) and PA 51 in Pittsburgh's West End while the northern terminus is at an interchange with Interstate 376 (I-376), US 22, and US 30 in Robinson Township.  The portion of PA 60 outside of Pittsburgh is known as the Steubenville Pike; within the city, PA 60 follows several different streets. Interstate 195 (abbreviated I-195) is an auxiliary route of the Interstate Highway System located in the U.S. state of New Jersey.  Its western end is at I-295 and Route 29 just south of Trenton, New Jersey in Hamilton Township, Mercer County while its eastern end is at the Garden State Parkway, Route 34 and Route 138 in Wall Township, Monmouth County.  I-195 is 34.17 mi in length.  The route is mostly a four-lane highway that runs through wooded areas in Central Jersey.  It has an interchange with the New Jersey Turnpike (I-95) at Exit 7A in Robbinsville Township and serves as a main access road to Six Flags Great Adventure (which is off the CR 537 exit in Jackson Township) and the Jersey Shore.  I-195 is occasionally referred to as the Central Jersey Expressway.  On April 6, 1988, President Ronald Reagan signed H.R. 4263 naming Interstate 195 in New Jersey the James J. Howard Interstate Highway, in honor of the late James J. Howard. Interstate 495 (I-495) is an auxiliary route of I-95 in Massachusetts, maintained by the Massachusetts Department of Transportation (MassDOT).  Spanning 120.74 mi , it is the second-longest auxiliary route in the Interstate Highway System, ranking behind I-476 in Pennsylvania by a difference of roughly 11 mi .
Answer: United States