Americans are boarding public buses, trains and subways in greater numbers than any time since the suburbs began booming.

Nearly 10.7 billion trips in 2013, to be precise - the highest total since 1956. The new numbers come from the American Public Transportation Association.

Transit ridership has now fully recovered from a dip caused by the Great Recession. With services restored following economy-driven cutbacks, the numbers appear set to continue what had been a steady increase.

Expanding bus and train networks help spur the growth, as does the nation's urban shift. Two sprawling cities - Houston and Phoenix - had large ridership gains. So did Los Angeles, Seattle, Miami, Denver and San Diego.