“Don’t let me miss the bridge,” its driver mumbles.

Stein is catching a few minutes of sleep in the passenger seat of the car following. She wants to be refreshed for the evening, she says.

A single volunteer holds a Stein sign in front of the Mann School as the vehicles arrive.

Keaney sings a melody from the Star Wars soundtrack as he pulls a cloth campaign banner from the car and unrolls it at the corner of Cambridge and Beacon Streets.

Stein speaks with a passerby who happens to be a homeless advocate. He is concerned that a vote for Stein will win the governorship for Romney.

She replies with a speech she’s given many times before, telling him that 85 percent of the Massachusetts legislature is Democratic and citing financial cutbacks that Boston’s homeless programs have experienced under the Democratic majority.

“It’s amazing how many people just don’t know,” she says after he walks away.

She feels certain that the homeless advocate will support her in the polls that afternoon.

Meanwhile, the Stein supporters hold up signs to passing cars. The lampposts at the intersection are covered with the posters of other candidates, and some O’Brien representatives stand a few feet away.

They have planned similar campaigns at the Boston Public Library and in Jamaica Plain and other locations. Stein then rests for a couple of hours before heading to Slade’s, the restaurant on Tremont Street where the Green Party will watch the election returns roll in.

Stein says she’s not nervous about the election’s outcome.

“It’s time to stand up and vote for what we believe in,” she says, “and wait for the chips to fall.”