People drive at 70 and faster on there notwithstanding, especially I-80. I-81 is its own ball of wax.
Decades ago, I-79 just west of Pittsburgh was known as the “Ho Chi Minh Trail.” By truckers-some of whom had fingers broken when the wheel would jerk violently after dropping into one of the many potholes. And absolutely horrific stretch of highway. Not sure what it is like now...