Historically, workers have lived in residential suburbs while commuting to work in the city. For Silicon Valley, however, the situation is reversed: many of the largest technology companies are based in suburbs, but look to recruit younger knowledge workers who are more likely to dwell in the city.
Private mass transit options offered by tech companies such as Apple, Google and Facebook linking San Francisco to Silicon Valley transport approximately 40% of the amount of passengers Caltrain moves everyday. Google alone runs 125 daily trips throughout the city.