Dissatisfied with the projected cost ($68 billion) of a high-speed rail system in California, Musk in 2013 proposed an alternate faster system, the Hyperloop, a pneumatic tube in which a pod carrying 28 passengers would travel the 350 miles (560 km) between Los Angeles and San Francisco in 35 minutes at a top speed of 760 miles (1,220 km) per hour, nearly the speed of sound. Musk claimed that the Hyperloop would cost only $6 billion and that, with the pods departing every two minutes on average, the system could accommodate the six million people who travel that route every year. However, he stated that, between running SpaceX and Tesla, he could not devote time to the Hyperloop’s development.