 If you overlook the "no smoking" signs outside Harlan A. Philippi Hall, you can't miss the signs at the door: "This is a smoke-free building."

The University of Southern Maine in September banned smoking in its dorms, forcing smokers to walk at least 50 feet away from the buildings to light up. Next fall, they'll have to go even further.

The school is among the growing number of colleges and universities finding new ways to restrict smoking on campus