For
It reduces traffic, pollution, and helps low-income families.
Against
It costs a lot and someone still has to pay through taxes.
Anonymous excerpts, translated where noted.
“If public transport was free, fewer people would be on the road, reducing congestion, traffic, accidents, carbon emissions and pollution.”
“It would be especially helpful for the poor. It would save the time and efforts of dealing with tickets, cards and policing them.”
“Making it free doesn't sound like a good way to fund the creation of more of it.”
“Most people don't want to use public transportation, so why make everyone pay for something they don't want?”