Mobile toilets give homelss a place to go

The streets of San Francisco's Tenderloin neighborhood, blocks away from fancy stores and long lines of tourists waiting for cable cars, have been cleaner since solar-powered toilets started rolling in four afternoons per week.

The bathrooms on wheels, which are mainly used by the neighborhood's homeless population, are guarded by attendants and have been so successful that city officials say Honolulu, New York and Portland, Oregon, have inquired about them as they have sought solutions to similar sanitation problems.

Supporters of the portable pit stops say that having public bathrooms accessible has made the neighborhood - known for its crime, homelessness and poverty - more livable.