Just because you can't imagine how it's done, I'm sure that people with kids, school and a job or two use mass transit in larger cities where there are more alternatives available.
Has nothing to do with whether or not I can imagine how it's done, or whether or not you're "sure" that they can in larger cities.
From the article:
A 2011 study by the Brookings Institution found that 7 percent of central Ohio households had no car and that nearly 80 percent of those households were classified as low-income. Another study released this month by the Washington, D.C.-based policy-research group found that, though 70 percent of jobs in the Columbus area are accessible by public transit, 73 percent of people would need to ride the bus for at least 90 minutes to get to them.
Christopher Jones, the Impact Community Action’s financial literacy manager, said that fact makes it more difficult for people who work two jobs to make ends meet, work and go to school, take children to day care or take care of their families. Relying solely on public transit makes it harder to work overtime, take shifts that begin or end when service is infrequent, or transfer to better opportunities in new locations.