But congestion pricing was also set to become one of the most ambitious American climate projects, maybe ever. It was meant to coax people out of their gas-guzzling vehicles, which are alone responsible for some 22 percent of US greenhouse gas emissions, and onto subways, buses, bicycles, and their feet.
“If we can’t make courageous, and potentially less popular, moves in a city that has transit readily accessible, then I’m wondering where this can happen,” she says. Other global cities have seen success with congestion schemes. London’s program, implemented in 2003, is still controversial among residents, but the government reports it has cut traffic in the targeted zone by a third.