Interstate 80
Interstate 90 (a narrow strip in the northwestern corridor near Erie)
US 6 - Grand Army of the Republic Highway
Interstate 76
Interstate 78
Pa i-76, i-81, i-80
the major highways are #29 and#133
There are many major highways in the United States. A few of the major highways are I-80, I-75, and I-70.
It is approximately 436 miles from Cleveland OH to Philadelphia PA. It all depends on which route you take however. It depends if you choose to take major highways or back roads.
The major north-south highways are I-75 and I-69. The major east-west are I-94 and I-96
I-95 is one of the well known highways.
They were and still are the major transportation routes.
Highways link cities - there are no major cities in the northern part of Canada
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