Task: Question Answering
Input (English): Passage: The former "Water Level Route" of the New York Central Railroad travels directly through Erie. It is now the mainline for CSX freight trains. The mainline of the Norfolk Southern Railway, originally built by the Nickel Plate Railroad, also travels through Erie. At one time Norfolk Southern trains ran down the middle of 19th Street, but were removed in 2002. Passenger rail service is provided by Amtrak's Lake Shore Limited out of Union Station at 14th and State Streets. The Lake Shore Limited stops twice daily—one eastbound towards New York City or Boston, and one westbound towards Chicago.
Erie International Airport / Tom Ridge Field (IATA code: ERI; IACO code: KERI) is located 5 miles (8.0 km) west of the city and hosts general aviation, charter, and airline service. Destinations with non-stop flights out of Erie include Chicago O'Hare International Airport via United Airlines, Philadelphia International Airport via American Airlines and Detroit Metropolitan Wayne County Airport via Delta Air Lines. Erie International is in the midst of a $80.5 million runway extension. The extension is slated to increase the runway's length by 1,920 feet (590 m), for a total runway length of 8,420 feet (2,600 m), "to meet safety requirements" as well as allowing the airport to accommodate larger aircraft.The Port of Erie is located on Presque Isle Bay, a natural harbor formed by Presque Isle. It offers some of the finest port facilities for cargo shipping on the Great Lakes, with direct rail access. The Erie−Western Pennsylvania Port Authority provides water taxi service in the summer months between Dobbins Landing and Liberty Park in downtown Erie, and the Waterworks ferry landing on Presque Isle. 
Question: What types of air transportation are provided at the airport that will have a new runway length of 8,420 feet?
Output (English): charter.