![]() Map of southwestern Pennsylvania and vicinity with I-99 highlighted in red | ||||
Route information | ||||
Length | 85.6 mi[1] (137.8 km) | |||
Existed | November 6, 1998[2]–present | |||
NHS | Entire route | |||
Major junctions | ||||
South end | ![]() ![]() | |||
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North end | ![]() ![]() | |||
Location | ||||
Country | United States | |||
State | Pennsylvania | |||
Highway system | ||||
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Interstate 99 is an Interstate Highway in the state of Pennsylvania in the United States. It goes from Bedford north to Bellefontaine. The route is 85 miles (137 km) long. It will be extended into South Carolina.