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Transportation in the San Francisco Bay Area is reliant on a complex multimodal infrastructure consisting of roads, bridges, highways, rail, tunnels, airports, and bike and pedestrian paths. The development, maintenance, and operation of these different modes of transportation are overseen by various agencies, including the California Department of Transportation (Caltrans), the Association of Bay Area Governments, San Francisco Municipal Transportation Agency, and the Metropolitan Transportation Commission. These and other organizations collectively manage several interstate highways and state routes, two subway networks, two commuter rail agencies, eight trans-bay bridges, a ferry, local bus service, three international airports, and an extensive network of roads, tunnels, and bike paths. A 2011 Brookings Institution study ranked the San Francisco MSA and the San Jose MSA sixteenth〔(【引用サイトリンク】title=Missed Opportunity: Transit and Jobs in Metropolitan America (San Francisco) )〕 and second,〔(【引用サイトリンク】title=Missed Opportunity: Transit and Jobs in Metropolitan America (San Jose) )〕 respectively, on transit coverage to job access. Another nationwide study, conducted by the University of Minnesota in 2014, ranked the San Francisco MSA second and San Jose MSA tenth.〔(【引用サイトリンク】title=Access Across America: Transit 2014 )〕 ==Airports== The following airports are served by commercial airlines. In addition there are many general aviation airports in the region. *San Francisco International Airport (SFO) *:The busiest in the region, and a major international hub airport in California second only to LAX (Los Angeles). Hub to United Airlines and Virgin America. *Oakland International Airport (OAK) *:The second-busiest airport in the region and a major base airport for Southwest Airlines. Oakland International Airport is the oldest of the Bay Area's civilian airports still in use. The site was chosen due to its superior weather conditions for aircraft operations. *Mineta San Jose International Airport (SJC) *:The third-busiest and fastest-growing airport in the Bay Area.〔(【引用サイトリンク】title=SJC Named Second Fastest Growing Medium Hub Airport in US for 2013 )〕 *Charles M. Schulz - Sonoma County Airport (STS) *:A minor airport in Santa Rosa, it is served by one commercial airline, Horizon Air. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Transportation in the San Francisco Bay Area」の詳細全文を読む スポンサード リンク
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