Transportation System of San Francisco
San Francisco is actually both a country and a city. It is a very large and a densely populated region in the state of California. This city is on 12th number in whole America for being most popular. The city is actually a hub of finance, culture, and transportation services in the whole San Francisco Bay Area. The infrastructure of San Francisco city is a greatly developed one with some really great highways and bridges built that lead to other cities and counties.