2. San Francisco, California
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Congestion level: 39%Average commute time: 32.4 minutes% of commuters using public transit: 33.6%% of commuters who walk to work: 10.6%
A metropolis as densely packed as San Francisco will naturally have some road congestion and a relatively long commute (the second-highest on this list). But many workers have found their way around the traffic. The city’s public transit map is intuitive—albeit complex, with options ranging from the railway to the BART to streetcars to ferries—and the proportion of commuters who walk to work outpaces that of New York City.