Graham Hicks, the councillor in charge of transportation, said that "it may well mean some bus routes closing".

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The Golden Gate Bridge, Highway and Transportation District is in charge of the bridge, which 38 million vehicles crossed last year, as well as transit buses and ferry services that it estimates serve more than 9 million customers annually, according to its website.

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But Uber did have to meet with the San Francisco Municipal Transportation Agency, where the woman in charge of taxis "was upset, " Mr. Kalanick says.

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