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The eastern region of the San Francisco Bay Area, commonly referred to as the East Bay, includes cities along the eastern shores of the San Francisco and San Pablo bays. The region has grown to include inland communities within Alameda and Contra Costa counties.〔(【引用サイトリンク】url=http://www.cacities.org/Member-Engagement/Regional-Divisions/East-Bay )〕 With a 2010 population of roughly 2.5 million, it is the most populous subregion in the Bay Area. Oakland is the largest city in the East Bay and the third largest in the Bay Area. The city serves as a major transportation hub for the U.S. West Coast and its port is the largest in Northern California. Increased population has led to the growth of large edge cities such as Berkeley, Hayward, Concord and Fremont. ==History and development== Although initial development in the larger Bay Area focused on San Francisco, the coastal East Bay came to prominence in the middle of the nineteenth century as the part of the Bay Area most accessible by land from the east. The Transcontinental Railroad was completed in 1868 with its western terminus at the newly constructed Oakland Long Wharf, and the new city of Oakland rapidly developed into a significant seaport. Today the Port of Oakland is the Bay Area's largest port and the fifth largest container shipping port in the United States.〔(【引用サイトリンク】title=North American Container Traffic, 2009 Port Ranking )〕 In 1868, the University of California was formed from the private College of California and a new campus was built in what would become Berkeley. The 1906 San Francisco earthquake saw a large number of refugees flee to the relatively undamaged East Bay, and the region continued to grow rapidly. As the East Bay grew, the push to connect it with a more permanent link than ferry service resulted in the completion of the San Francisco–Oakland Bay Bridge in 1936. The Bay Area saw further growth in the decades following World War II, with the population doubling between 1940 and 1960, and doubling again by 2000. The 1937 completion of the Caldecott Tunnel through the Berkeley Hills fueled growth further east, where there was undeveloped land. Cities in the Diablo Valley, including Concord and Walnut Creek, saw their populations increase tenfold or more between 1950 and 1970. The addition of the BART commuter rail system in 1972 further encouraged development in increasingly far-flung regions of the East Bay. Today, the valleys east of the Berkeley Hills contain large affluent suburban communities such as Walnut Creek, San Ramon and Dublin. The East Bay is not a formally defined region, aside from its being described as a region inclusive of Alameda and Contra Costa counties. As development moves generally eastward, new areas are described as being part of the East Bay. In 1996, BART was extended from its terminus in Concord to a new station in Pittsburg, symbolically incorporating the newly expanded Delta communities of Pittsburg and Antioch as extended regions of the East Bay.〔(【引用サイトリンク】title=North Concord Station Information )〕 Beyond the borders of Alameda County, the large population of Tracy is connected as a bedroom community housing commuters traveling through to or through the East Bay. 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「East Bay (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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