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|Maintained by PennDOT|
|Length||85.6 mi (137.8 km)|
|Existed||November 6, 1998–present|
|South end||I-26 / I-526 near Charleston|
| PA 56 near Cessna|
US 22 near Altoona
US 322 near State College
PA 26 near Pleasant Gap
|North end||I-80 / US 220 near Bellefonte|
References[change | change source]
- "Report of the Special Committee on U.S. Route Numbering to the Standing Committee on Highways" (PDF). American Association of State Highway and Transportation Officials. November 7, 1998. Archived from the original (PDF) on October 12, 2006. Retrieved July 18, 2010.
- Google. "overview map of I-99" (Map). Google Maps. Google. Retrieved July 18, 2010.
|KML file (edit • help)