Google triples self-driving car fleet in four months

Google is expanding its self-driving car fleet quickly: in the last four months the number of cars it is permitted to drive on California streets has more than tripled.As of Monday, Google has licenses for 73 self-driving vehicles, up from 23 cars in mid May, according to records from California’s Department of Motor Vehicles. Under state law, companies wishing to test autonomous vehicle technology on public roads need a permit for each vehicle from the DMV.All of the expansion of Goo