The first town in Quebec one would hit is called Blackpool--which is about 25-30 minutes away....roughly 22-23 miles. This would be following US 87. US 81 does not run through Plattsburgh.
Interstate 81 goes south to its southern terminus in Tennessee where it connects with Interstate 40.
I-476 to I-81 to I-90 gets you to Buffalo. Then I-290 to I-190 gets you to the Canadian border, where I-190 turns into the 405 freeway, which takes you to the Q.E.W. to Toronto.
81 miles is 130.36 kilometers.
81 miles
60 miles to the border on 29 75 miles to the border on I-81
81 so far, hopefully there will be a patch release for the levels after 81 soon.
so far 81
81 miles
81 miles
81 miles
65 miles by taking this route:get up to I-81, take I-81 NORTH.Take I-81 NORTH to I-78, then take I-78 EAST to Allentown.
On your calculator, there should be a Tan button. Hit that, then type in 81. Voila! Tan81 = 6.313751515 (As far as my calculator shows.)