This is how I used to go out there. I'd take 287 to 78, then 78 all the way to 81. From 81 I would hop on 76 near carlisle. then I would get off at the exit for 99 and take that to 22, cause my school was right off of 22 in Blairsville. I don't know how close to Pittsburgh 76 actually gets, I'm too lazy to look on a map
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Pittsburgh raceway park is also out there on 22. really close to Wyotech, but the elevation is a little high, so times would suffer a bit.