If the Boston transit system is anything like the NYC subway, it seems to me Mitt Romney got a pretty good feel for it yesterday:

’He’s busy thinking about running for higher office,” said James Shepard, 58, of Dorchester, who regularly takes the Red and Green lines to the VA hospital.
As Timothy O’Leary, 67, stood waiting yesterday at the JFK-UMass Red Line stop, he had a suggestion for the governor: ”If he thinks it’s a dollar, make it a dollar.”
The rest of Romney’s day didn’t go quite as planned, either. First, a homeless man harassed him on the way to the Park Street T, loudly demanding at the news conference: ”Are you running for president?” Later came the ”cat lady” — Heidi Erickson, locally infamous for allegedly hoarding cat carcasses in her Beacon Hill apartment — who screamed, ”You killed my cats,” and scuffled with transit police as Romney spoke at Park Street Station.