INDIANAPOLIS — Arthur Call commutes three hours roundtrip to his anatomy class at community college because similar courses on campuses closer to his Indianapolis home are packed this semester.

“Classes around the state were just full,” says Call, a full-time student who takes the rest of his classes in Indianapolis. “Thank God it’s only Tuesdays. I just have to drive there once a week.”

President Barack Obama wants to invest some $12 billion in community colleges with the aim of seeing an additional 5 million students graduate by 2020. This goal comes while many schools are already bursting at the seams with droves of displaced workers hit by the recession competing with traditional students seeking an education bargain.

Much of the money for the nation’s 1,200 community colleges comes from local and state sources.

That funding has been hard to come by during the economic downturn, even as enrollment booms.

Obama’s 10-year initiative would provide a welcome infusion of cash, but some fear it would not sustain community college programs.

The conundrum comes at a time of intense growth for the more than century-old community college system, which already educates more than half the nation’s undergraduates.

And more young Americans than ever are going to college, particularly community college.

A record high of about 11.5 million Americans age 18 to 24, or nearly 40 percent, attended college in October 2008, according to a study of Census data recently released by the Pew Research Center. Almost all of the increase of 300,000 students over the previous year came at two-year schools.

About 12 percent of 18- to 24-year-olds were enrolled in community colleges last year, up from 10.9 percent in 2007.

Michael Hansen, president of the Michigan Community College Association, says classes in popular fields such as nursing require low student-to-faculty ratios and expensive equipment.

He is concerned it will be difficult to meet new demand without yet more funding.

“It’s a little bit of a bittersweet pill,” Hansen said. “It’s great that people are coming back to community colleges to get trained, but a student only brings about a third of the cost of their tuition.”

While officials wait to see whether Obama’s plan will become reality, community colleges are turning to creative — though not always convenient — ways to cope with already large crowds.

Bunker Hill Community College in Massachusetts holds graveyard shift classes that end at 2:30 a.m., while the Community College of Baltimore County in Maryland has converted a student lounge and locker room space into classrooms. Parking shuttles and weekend classes are popping up across the country.