mapquest doesn't always give the best routes.
i guess it depends on which part of pa you're going towards.
if you're headed towards the eastern part of the state, go
with pat's directions. if you're headed towards the west,
think about taking 81 instead. it goes through the western
part of va, through a small section of md, then on into pa.
I've found an "inverse knowledge" correlation to Mapquest directions:
The better you know where you're going, the less their directions make sense.
Southeastern Pennsylvania.