In Intern year almost all of my rotations were true 12 hour shifts with 30 minutes of sign out at the end. That's if you get your work done on time and never have an admission run over. That leaves 210 conscious minutes outside of the hospital, six days a week, to exercise, hygiene, prep all your meals, read on your patients, and relax. You really want to take 80 minutes of that to drive?
If you live farther away you will also:
1) Be one traffic jam away from being seriously late and labeled a problem resident
2) Likely fall asleep behind the wheel after night float
3) Spend 5K/year between the extra depreciation on your car and the extra gas for the commute.
4) Learn to hate your car, and all local radio stations, with a furious passion.
Live near the hospital. As close as humanly possible, walking distance if its available. Occasionally I have met senior residents who commuted and weren't completely miserable, but as an Intern this plan is f-ing crazy.