I-81 north to I-80 East to 209 at Stroudsburg, and up to I-84 East, OR bite the bullet and stay on I-81 up to Scranton to pick up I-84.
On google maps, looks like 209 is 45mph, not sure if that's for the entire length.
29ft class C with toad on dolly.
2007 Forester 2941DS
2014 Ford Focus
Zamboni, Long Haired Mini Dachshund