<Tr> <Td> Broad Causeway </Td> <Td> North Miami and Bal Harbour </Td> <Td> 1951 </Td> </Tr> <P> Miami has six major causeways that span over Biscayne Bay connecting the western mainland, with the eastern barrier islands along the Atlantic Ocean . The Rickenbacker Causeway is the southernmost causeway and connects Brickell to Virginia Key and Key Biscayne . The Venetian Causeway and MacArthur Causeway connect Downtown with South Beach . The Julia Tuttle Causeway connects Midtown and Miami Beach . The 79th Street Causeway connects the Upper East Side with North Beach . The northernmost causeway, the Broad Causeway, is the smallest of Miami's six causeways, and connects North Miami with Bal Harbour . </P> <P> In 2007, Miami was identified as having the rudest drivers in the United States, the second year in a row to have been cited, in a poll commissioned by automobile club AutoVantage . Miami is also consistently ranked as one of the most dangerous cities in the United States for pedestrians . </P> <P> In recent years the city government, under Mayor Manny Diaz, has taken an ambitious stance in support of bicycling in Miami for both recreation and commuting . Every month, the city hosts "Bike Miami", where major streets in Downtown and Brickell are closed to automobiles, but left open for pedestrians and bicyclists . The event began in November 2008, and has doubled in popularity from 1,500 participants to about 3,000 in the October 2009 Bike Miami . This is the longest - running such event in the US . In October 2009, the city also approved an extensive 20 - year plan for bike routes and paths around the city . The city has begun construction of bike routes as of late 2009, and ordinances requiring bike parking in all future construction in the city became mandatory as of October 2009 . </P>

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